I’m usually a m/l if it doesn’t stretch, I purchased a small since it said stretchy, fit a lil snug in arms but still comfortable. I’m 5’5 170lbs curvy 36DDD -waist 29in-hips 45in. it stretchy but the arms were sung my arms measure like 11in 😮‍💨 Also is a bit see through! I didn’t use a bra I used my cakes/pasties and a tan thong and you’re good to go! I got a lot of compliments and I really love this dress wish they made more colors the fit is just ❤️‍🔥❤️‍🔥❤️‍🔥