I’m usually in between a medium & large but based on reviews I decided to size up to a large & it was perfect. Once I closed all the buttons , it fit PERFECT & the strings are adjustable so you can tie it as tight or as loose as you’d like. I’d recommend sizing up one size ! Got so many compliments , I thought it’d made me too hot but wore it all night in Florida heat & clubs & felt fine (& I’m usually ALWAYS hot but felt fine all night) I HIGHLYYY recommend this dress!!