Make sure to measure your wrist with a ruler if you are unsure! Most customers will fit a medium-large.

Small: 5" - 5¾" Usually fits younger people and the average woman with thin wrists.
Medium:6" - 6¾". Usually fits the average woman, men with thinner wrists, and teenage boys.
Large: 7" - 7¾". Usually fits the average man.

Bracelet sizes may vary slightly depending on bead pattern
For more details, visit this page:Find Your Bracelet Size,