Reposhing this item because it’s too big. It’s a normal large but big for Farm Rio. Beautiful dress and I did buy a medium. Great for summer and vacations. You can use the modesty snap or not. Armpit to armpit is 19 inches approximately, seems like it can stretch to a little bit more than that. Straps are adjustable, zipper up the side, can show some cleavage. Great for vacation, summer, or date night.