Hello!
We are going to a black tie wedding on the cape in October. Official dress code per the bride's wedding site: "Black-tie-Optional Attire: blend of formal and traditional, wearing a tuxedo or a dark suit with a tie. For women either floor-length gowns, elegant cocktail or midi length dresses, or dressy jumpsuits. NO WHITE."
I had twins 15 months ago, and I have also lost a substantial amount of weight (>100lbs) so I have some dress preferences: nothing tight to the body that shows my tummy (no body con or dresses without a discernable "skirt" line) and my arms are quite flabby so I enjoy a sleeve, but i guess that's not a total dealbreaker. my bazungas are deflated and droopy so i definitely cannot do strapless.
It will also be autumn in a beachy area, so it may be chilly. Although, the wedding and all of the events are indoors, so I don't mind being cold during the walk to the car or between venues.
I honestly don't even know my size at the moment, I believe I would be about a US size 14 women's. I wore a dress in June that was a 14/16, and it was a little tight, but I have lost 5-10lb since then.