Lulus True Excellence Floral Bustier Off-The-Shoulder Dress Size XL Fits 12

18” armpit to armpit. Stretches another 3/4” 16.5” waist- measured at high waist 57” I added 5” to top of dress to get this measurement to get length- off the shoulders. 5’ 7” ladies didn’t have a problem with length with higher shoes. If you are less than this you’ll need alterations for sure My daughter (Age 21) tried on, she is size 12, C/D Bra New with Tag