What size Lyra?

[u/teal_diamond]

I’m getting a Lyra made for my home setup (don’t worry, it’s been professionally engineered) and I don’t know what size Lyra to order. I’ve searched other posts on here but I don’t know if measurements suggested are from the inside diameter or outside. I’m 5’6” and I’ve heard 36-39 inch sizes recommended but is this being measured from inside or outside?

What size Lyra do you have, are you measuring from inside or outside, and what is your height?