This dress is unusual. it can be dressed up with wedges and dressed down with cool sneakers. if you have any under arm excess fat it will show...but you can hide it with a cropped cardigan. i am 5' 1", 105 pounds, lean athletic frame with a 32b bust and it fit well and snug.i bought an xxs. i am relatively lean under the under arm but this dress does show any flaw in this area and it does not look good. minus point. super cute and made well. i wear it with a cardigan.