I purchased 2 of these braceLets as friendship braceletS for myself and a close friend. We both have tiny wrists, although mine is a bit more muscular than hers and i purchased both small. I actually think extra smalls Would have been more appropriate, esp for her wriSt. If this is for Someone who wears a size small oR xs in kjp clothes, get an Xs bracelet. I love thEse though and would absolutely buy again as a gift. The heart lays beautifully against the wrist.