Blue Ombre Maxi Dress Halter Asymmetrical Embroidered Smocked Waist Size M Approximate Measurements Lay Flat Pit to pit: 15.5" (without stretching) Waist: 29" (without stretching) Length: 38.5" (measured from the middle of the back of the dress to hem) Smocked back for a flexible fit The brand's website says it's One Size. Based on the measurements and trying it on the dress form, I believe it fits Sizes M - XXL best :) Pre-owned by a neighbor. No stains, no flaws. All offers will be considered :) I'm a fast shipper and a top-rated seller.