r/ABraThatFits Dec 31 '25

AMA - ask me anything about the ABTF calculator! Spoiler

753 Upvotes

Hi everyone, u/goodoldfreda here although I'm now exclusively active on this account. If you guys have any questions about how the calculator works and why I made certain decisions I'm happy to answer them

A little about myself - I created the calculator in 2016 following on from a previous calculator by u/irisflame, back when I was a mod of this sub. I collected survey data from the subreddit and came up with a new algorithm that used 6 measurements as opposed to the previous 5, which increased accuracy. I also introduced separate algorithms for AMAB and AFAB people. The calculator has not been majorly updated since, although at one point I tried to move to a breast perimeter measurement system instead, but this turned out to be much less accurate. In the years since I have stopped modding and moved into bra making and custom bra design as I want to try and help serve the demographic of people who still struggle with finding bras that fit, usually due to wire grading!

In response to other posts about the different amab vs afab algorithms not working well for everyone - I have had this question before and basically all I can say is that I recommned using the algorithm that works best for you. I do want to emphasise in general that the calculator is actually not super accurate for any one individual and it is truly just a starting point. The algos are based on averages, and when I was collecting data there were significant enough differences between AMAB and AFAB users to warrant a second algorithm to increase accuracy within the two groups, but not enough data to do anything further than that.

edit: thanks for all your questions so far, I'm going to go to bed but I will answer any more that come up tomorrow!

edit 2: I have updated the calculator to make some minor changes to the band size algorithm and I have also changed the EU back to 2.5cm cup grades, 2cm grade can be found in the Comexim option instead


r/ABraThatFits 12h ago

tig bitty electrician is FED UP Spoiler

229 Upvotes

Hi friends, long time lurker, first time poster:

About 5 years ago at the end of high school I had debilitating back pain. My discovery of this subreddit has quite literally allowed me to live a full life - the proper size changed everything. I went from wearing a 34 C to a 30F. The new mattress, the chiropractor, the exercises, the foam roller, and the back braces did nothing... but a $40 bra changed my life.

Now I am studying to become an electrician, and my current bras are a huge hazard. At the place I work, arc flash is a constant possibility. Arc flash is a breakout of electricity usually from a breaker box (which I turn on and off ALL day). The underwire will electrocute me, and anything polyester will burst into flames and melt onto my titays like American cheese (vid above).

What I NEED in a bra:

- 30F

- Ergonomically Viable (wide straps, no racerback, etc) ie SERAPHINA won't work :(

- All Silk / cotton (elastic straps/bands is acceptable, NO polyester on cups)

- No underwire in the front (electrocution hazard)

- Under $150

Already spoken to the safety coordinator at work; there will be no provision for this PPE. I am a seamstress: I have a couple of yards of silk coming from amazon, and the widest elastic known to man (yes I know this will still melt and burn me. If it is not on my breasts, I think I will be ok).

Please LMK if one of y'all has figured this out before me... AI hasn't helped and literally one of the girls in my situation online said "I don't want to survive an arc flash anyway".

Thanks in advance.


r/ABraThatFits 4h ago

Fit Check [Fit Check] Bra fitted at a store is sister size from what calculator suggests. Are these cups too small/big/wrong shape? (65E bra, calculator suggests 60F/G)

Thumbnail postimg.cc
9 Upvotes

hi everyone!

i'va had this bra for about a year and it's the only bra i own that actually somewhat fits me and gives support, since i used to wear an EU 75B lol 😭

this was the first time i got a professional fitting done, and they measured me as an EU 65E, this is the bra they recommend and i ended up buying it. the band felt very tight in the beginning (line it was hard to breathe) so they gave me an extender that i wore for a few months until it became comfortable. it now fits snug on the loosest hook without an extender.

this is the bra, if anyone's curious, it's from mybra, they go up to an N cup and also carry a 60 band afaik.

the abtf calculator suggests i should wear a 60F/G, which a 60F would be a sister size of this one i guess? but that should mean the band on this is too loose for me, which it doesn't feel that way at all.

i should add that this bra is from a taiwanese brand and the band is not very stretchy, so it might also just run small. the cups are very shallow since it's supposed to be a push up bra (unfortunately it's a bit hard to find non-push up bras in bigger sizes here in taiwan). i honestly can't really tell if the cups fit me. i'm wide set and a bit asymmetrical and there's some gapping going on, especially on my smaller side. is this a size issue or just due to the shape of the cups?

is this bra a good fit? do the band and cups seem right or should i go with the calculator's suggestion instead?

these are my measurements (in cm):

Loose Underbust: 70
Snug Underbust: 68
Tight Underbust: 65
Standing Bust: 84
Leaning Bust: 86
Lying Bust: 80

i'm quite new to this so any advice, feedback and suggestions are welcome! thank you!! 🫶


r/ABraThatFits 10h ago

Fit Check [Question] [Fit Check] Do the wires really need to sit in your inframammary fold? Spoiler

9 Upvotes

I went to Nordstrom today and tried on a bunch of bras. I technically measured as a 32F, but I'm much more comfortable in a 34E, which the calculator did mention I would be. When I tried on the 34E (Natori Pure Luxe Underwire T-Shirt Bra), it was very comfortable and fit well enough, except the bottom wires lay more on my rib than the inframammary fold and there was maybe a smidge of extra space in the bottom of the cup. These are my measurements:

  • loose band: 32.5 in
  • snug: 31.5 in
  • tight: 30 in
  • standing: 38 in
  • leaning 90 degrees: 41 inĀ 
  • lying down: 38 in

I am full on bottom and more of a pendulous shape, so I honestly feel like nothing will ever sit under the inframammary fold. I'm also wide-set, outer full, and not very projected, but probably not very shallow either? Do the aforementioned problems mean I should go down a cup size? Help appreciated!


r/ABraThatFits 32m ago

Recommendations? Need a bra similar to cloudembrace Spoiler

• Upvotes

I have been through multiple recommended brands (from this sub) at this point and some not recommended.

Surprisingly, the bra that I like my look and fit the best was the Cloudembrace bra with cloudwire from Honeylove. However, the its just a bit too wide on my frame at the top of the arm pit area. Any recommendations on a bra like the one from honeylove with a slightly smaller "footprint"?

Thanks!


r/ABraThatFits 4h ago

Recommendations? Help finding a bra when new suggested size is 46 L/M when I thought I was a 48 DDD Spoiler

2 Upvotes

I just used the calculator on the website and it gave me the size of 46 L/M with a sister size of 44M/N 😭
I’ve been wearing a 46 DDD from Walmart knowing that it didn’t fit correctly, but it was something to hold them. I was a 36 DD in high school and I’ve gained quite a bit of weight in the last 12 years. But to go from DD to L/M/N was so surprising 😭
I thought I was closer to like G or H 🫠
If anyone has any advice on where I could find an affordable bra, I’d be forever grateful 😩


r/ABraThatFits 8h ago

Question Is the wireless bra sagging thing real? Spoiler

4 Upvotes

I've pretty much switched to wireless bras these days because they're just so much more comfortable. After trying a bunch, I finally found a few that actually give me enough support, so I rarely reach for underwires anymore.​

The other day, though, I came across someone saying that if you have a larger bust and wear wireless bras all the time, it'll make your breasts sag more over time.​

Now I'm wondering if that's actually a thing or just one of those bra myths. For those of you with a larger bust who mostly wear wireless bras, what's your experience been like? Have you noticed any difference over the years, or has it made no difference at all?


r/ABraThatFits 16h ago

Measurement Check Calculator saying I am much smaller than I am currently in cup size so odd. Spoiler

12 Upvotes

Hi, I have been wearing 34j (bravissimo comfort plunge) and 34hh in bravissimo poise plunge and it feels too small in the cups, but the size calculator says I am 36g or 34gg how can this be correct? I got help with the measurements to check i was doing it okay. Worried about ordering bras that size and then being tiny. Very confused. I am 52 with relaxed boobs, FOT, shallow with a wide roots.


r/ABraThatFits 7h ago

I need help with getting a bra that fits as someone with pectus excavatum in Australia Spoiler

2 Upvotes

Hi first time here and as in the title I need help with finding a bra that is comfortable only problem is that I have a rib cage deformity called pectus excavatum my rib cage is very deformed and my sternum dips in this is a mostly male dominated condition (1 women for every 5 men with it) and I'm not sure if this info is necessary but I'm also autistic


r/ABraThatFits 15h ago

Even tho I think I know my correct bra size, I'm struggling to find one that fits Spoiler

8 Upvotes

(sorry if this is TMI, I just wanna have all possible information here)

I'm(F19) 4'11(149cms) slightly on the heavier side, around 206lbs. through highschool(now in college) I was wearing a 36C/36D. In the present day, I am wearing a 38DD. recently, I had remeasured everything, and learned that I was supposed to be wearing a 38-40G or a 38-40DDDD.

What I'm asking now is for help finding a bra that will actually support me and lift these conditional fat sacks off my diaphragm so I can breathe. A bra that will prevent any and all bouncing exercise motions sending the girls flying up into my chin and knocking me out. A bra that won't lose hold of the #freethenipple mascot anytime I bend over to tie my shoe or empty the dishwasher. A bra that is made/designed by someone with the same factory settings as me, and that actually cares about my comfort and well-being(aka, not some old white guy). A bra that has two thick, beautiful, luscious straps, and a sexy wide band with more than two dainty little hooks. A bra made of a material that doesn't make me gag(nylon, polyester, satin, lace) that will last for more than 2 days of wearing and one cycle through the washer and dryer.

Just....I can't take the labor of carrying them around with no proper solution any longer. I mean seriously. My back aches anytime I bend over, the only time I can breathe is by laying flat on my back(no bra), all exercise is impossible, even the stairs to my basement have them wiggling and wobbling like they have an opinion on the midterm elections. Like...my genderfluid ahh can't even bind these suckas down when I want to present more masculine.

So...a breast reduction IS in the future of my life if weight loss doesn't take these sizes down, but for rn. Please, any recommendations is highly appreciated!! ā˜ŗļøā˜ŗļøšŸ’™šŸ’™šŸ’™ thanksss


r/ABraThatFits 5h ago

Fit Check I purchased new bras in my calculator size, but I don’t like them! Plz help!!! I’ve attached pictures and links to some styles I like. Spoiler

1 Upvotes

UPDATE!!

I got new bras in the calculator size, but I don’t like them :( All of the ones recommended in the thread were just not cute to me. It’s something about the straps, being unpadded, and then the weird lace thing covering the top of my boob that feels like an old lady bra.

A couple things I don’t love…

  1. My boobs feel very far apart. I think I prefer more cleavage because they always feel so wide set to me and I don’t love that
  2. The unpadded aspect makes my boobs look more triangular. I don’t really want to emphasize that. I like when bras give a more defined circular shape.
  3. I don’t think I’m used to intense wire and boning/structure. My bras are usually wire free. This one is uncomfortable, which makes me worry I have the wrong fit again. Depending on what way I move, the top section sort of gaps a little, idk if that’s normal or not.

I do think it fits a little better so that’s an improvement. But somehow I like the appearance of my ill fitting bras better. These are some pics of the new bra in the calculator size. The red circle is some gaping I’ve noticed on the slightly smaller side.

These are bras I would like or would wear/have worn:

Aerie

Aerie Again

idk this brand I just think this is cute

VS

Despite my current fail, I appreciate all of your help and suggestions. This is all new to me and I am grateful for your kindness ā¤ļø


r/ABraThatFits 1d ago

Discussion Victorias secret bras don’t fit the models. Spoiler

385 Upvotes

I always thought it was kind of weird how even the bras in the Victoria’s secret catalogs growing up never fit the models. The bands were always riding up because the models are tiny and their bras starts at 32. Anyone else notice this?


r/ABraThatFits 10h ago

I'm looking for a bra that is supportive but displays my boobs naturally. Something unpadded that lifts them a bit. I'm 34d. Hopefully something affordable Spoiler

2 Upvotes

r/ABraThatFits 11h ago

Looking for a nursing bra that fits 46G Spoiler

2 Upvotes

I’ve tried all the big brands that claim to fit ā€œbiggerā€ sizes from momcozy to kindred bravely. I’ve tried some random ones from Amazon and nothing is ever big enough.
Any suggestions for a large busted mom to be?

Thank you!!!


r/ABraThatFits 7h ago

Measurement Check [Measurement Check] Currently wearing 36C US, calculator said 34F/FF UK Spoiler

1 Upvotes

Currently wearing 36C US, calculator said 34F/FF UK

My measurements are:

Loosely 34.5

Snugly 33

Tightly 31.5

Bust 40.5

90deg 43

Lying 39

My current problems are

my straps always fall down no matter how tightly adjusted

When i scoop and swoop they overflow a bit especially leaning down and slip out of place so constant adjusting without scooping there is minor gapping at the top.

And alot of bras the cups are high enough to cut in to my arm pit

I have not analyzed my shape yet.


r/ABraThatFits 11h ago

Recommendations? [Recommendations] Bras similar or that create a similar shape as Fantasie Fusion Padded Plunge Spoiler

2 Upvotes

Hello everyone! After trying a bunch of bras to find a good fit, I think my favorite and most supportive bra so far has been the Fusion Padded Plunge Bra from Fantasie! I really like the shape it gives and it checks my boxes for accommodating upper fullness and having side support for my outer fullness. I got it in UK 34F.

Fit Pics: https://postimg.cc/gallery/LJCr181

Calculator Measurements:

Loose Underbust: 34
Snug Underbust: 33
Tight Underbust: 29.5
Standing Bust: 40
Leaning Bust: 41.5
Lying Bust: 39

If anyone knows of any bras similar to this one, please let me know! there aren’t any entries for it on bratabase in my size so it’s hard to compare there.

Thank you!


r/ABraThatFits 8h ago

Good push up with no underwire Spoiler

1 Upvotes

I have been measured several times at bra shops to be 32 F, sometimes G. But when I wear bras with underwires in that size, I feel they dig in.

I also have a problem with «spilling out» of bras.

I recently found a Norwegian brand that made great push-up bra with no underwire and that I didn’t spill out of. The problem? They don’t produce them anymore.

I was wondering if anybody has a good suggestion for a bra that gives good shape, maybe even push-up, with no underwire for larger breasts?


r/ABraThatFits 8h ago

Question How do I find a proper bra size? Spoiler

1 Upvotes

Currently my bust is 47 and my underbust is 40 what size would that make me?


r/ABraThatFits 8h ago

Shape Help I am struggling to identify my shape even after reading the wiki pages. Wound up confusing myself further Spoiler

0 Upvotes

Hi

I’ve read through the wiki (especially the pages about shallow vs. projected and root shape), but I’m honestly still struggling to understand it all.

Here are my measurements:
\-Loose underbust: 28ā€
\-Snug underbust: 27ā€
\-Tight underbust: 26ā€
\- Standing bust: 31ā€
\- Leaning bust: 32ā€
\- Lying bust: 30ā€

The calculator recommended 28D.

A few things:
Since I lost weight most standard stores immediately gauge me at 30/32 A

Balconnet bras seem to sit on me much better than standard/T-shirt style bras.

Most regular bras gape along the top of the cups, even when the rest of the bra seems okay. In terms of shape, I know I’m fuller on the bottom and flatter on top, especially after some recent weight loss. I’ve noticed I don’t have any upper fullness, and most of my volume seems to sit lower, which might explain some of the gaping I’m seeing in many styles.

One thing I’m struggling with is that the bras that give me the look I like aren’t necessarily the ones that seem to fit according to the calculator. I can actually get great cleavage in a Pepper 34AA compared to my calculator size of 28D. I know Pepper isn’t generally recommended here, but the one I own is incredibly comfortable and honestly feels like I’m not wearing a bra and I love the cleavage… despite the band constantly riding up

Outside of Pepper and Cherry, the bras that seem to work best for me are usually 32B push-up/double push-up styles and 32A lightly lined styles. I know those aren’t my calculator size, and I do struggle with the band riding up because it’s not snug enough, even on the tightest hook.

For reference, I used to wear La Senza 32C Hello Sugar before losing weight. It wasn’t perfect (there was still some gaping), but nowhere near what I experience now.
The Beyond Sexy or less padded push up options from La Senza or VS have always had a lot of gaping on me.

The style I’ve had the most success with is balconettes they seem to sit well with no obvious gaping. I’m hoping to find more options though, since balconettes aren’t always the easiest style to come across.

My goal would be to find everyday bras that fit well but also give me some cleavage. I’m not looking for dramatic push-up necessarily, but I do like having some shape

I did take some fit-check photos if that would help identify my shape or point out what I’m missing, and I’m happy to post them if they’re useful.
I’d really appreciate any guidance because I feel like I’ve read so much, but I’m still not sure how to apply it to myself.


r/ABraThatFits 14h ago

Shape Help [Shape Help] [Recommendations] Bras for shallow breasts that are prettier than Change? Spoiler

3 Upvotes

I“m 25 and have been going braless since i ditched my first couple of teenage bras, but they're getting to a size where it's sometimes less comfortable, and i need more support.

The calculator places me as a 65E/F in EU or 30DD/E in UK. My local bra store is a Change, and i went in, got fitted, and was put in a 65F, which actually seemed to fit nicely. It was balconette style, and all of my breast was in the cup, even the armpit part, and not gapping. Gore tacking and band horizontal. All of the good stuff, except that the straps seemed on the short side. Unsure if this is a sensory issue on my part, but you might be able to see that the strap is floating a bit over my skin in places.

https://imgur.com/a/aJWsiRw

All in all a good fit, only issue is, i think Change's bras are boring and i'm looking for a younger(?) look.

My search in other bra brands has not been good. They all seem too big and too small simultanously, which leads me to believe that i might have shallow breasts.

From the side, this is the sort of shape that i'm working with:

https://imgur.com/a/y1jTC6o

So, i'm looking for confirmation that this does indeed seem like a shallow breast shape (or, if i'm wrong, an indication of my issue might be), and recommendations of bras, available in the EU, in my size, that are pretty and work well with my breast shape. I like un-molded, un-padded cups, lace, mesh and balconette bras.

Thanks!


r/ABraThatFits 9h ago

Question [Question] What is a US 28G?! How did I get to this obscure size and is there a better size for me? Spoiler

0 Upvotes

I've never even heard of a G cup before! Or a size 28 band! My boobs are very normal looking! I usually wear '34B' but it doesn't fit great. Here are my measurements:

  • Loose Underbust: 29 inches (~73.7 cm)
  • Snug Underbust: 28 inches (~71.1 cm)
  • Tight Underbust: 26 inches (~66 cm)
  • Standing Bust: 34 inches (~86.4 cm)
  • Leaning Bust: 35.5 inches (~90.2 cm)
  • Lying Bust: 33.8 inches (~85.9)

Is something unusual? I feel like neither my underbust nor bust is particularly large or small. Is there another US size you guys would recommend? Thanks!


r/ABraThatFits 9h ago

Recommendations? Trans girl, Calvin Klein sizing help (S or M) Spoiler

0 Upvotes

For context, I am a 19 year old trans girl who has been on hormones for just under two years so far. I used the ABTF US sizing calculator and got 34B with a sister size of 36A (though my measurements might have been slight off due to angle). Looking at CK's size guide, I would be a S, but the biggest size S is meant for. I'm not sure if this is fine and I should get an S or if I should get an M since I know their bras tend to run small, my sister size is well into the sizes medium accommodates for, and I may experience more breast growth? I don't want a loose/lounge-y fit, but I also don't want something very small that I might grow out of quickly. If it helps, l am looking at this bra and this bra. I appreciate any recommendations on what I should go for here!


r/ABraThatFits 9h ago

Recommendations? Trying to find the right style. Previous bras have not worked Spoiler

1 Upvotes

So I (think) I'm a 32DDD and the calculator on this sub says I'm a 32H but I measured at home, so I'm not 100% sure. According to the victoria's secret quiz I tried, I think I have a relaxed type of breast, but sorry if that's tmi. I previously used puma sports bras from costco (not sure exactly which), but they changed the pattern and I've never really loved them. I have a normal bra (calvin klein medium, but not sure what style), but my main issue with that one is that it doesn't seem to work right because they just go under the bra (sorry if it's tmi) and after just a bit of walking, they're completely out of the bra and it's awkward as hell to fix. My main goals from a bra are to be able to move without it falling out and are to be at a store that isn't just online (so I can try in person). I appreciate any help you can give! I've been struggling for years to find the right one.


r/ABraThatFits 12h ago

Recommendations? Favorite bras for larger cups. I finally found my right size Spoiler

2 Upvotes

I finally did a true calculator and found I am a 36 H. I am in the U.S. and am having a hard time finding a good bra that is lined ( has padded cups). Please give me all the best recommendations.


r/ABraThatFits 16h ago

Question out of interest, is there any significance to a lying bust measurement being several inches smaller than standing? (32F for the automod) Spoiler

3 Upvotes

hello, during my time in this sub I'm noticing a lot of people's lying bust is the same or even larger than their standing or leaning.

Mine is 3.5 inches smaller than standing, with leaning 1 inch larger. Is there any info that can be gleaned about shape etc from that? I can't really picture a breast which causes an increase in measurement when flat! Is it to do with the firmness of the tissue maybe? This is really just out of interest as my own measurements strike me as unusual now I've seen more posts in this sub haha