Chatham Bracelet in Navy/Pink/Green by Lemon & LineWe recommend using a string to determine your correct size. Wrap the string loosely around your wrist, insert a finger under it to give a little more room, and measure the result. Err on the larger side & round up if you are between sizes. The "average" female wrist is between 7 & 7. 5 and males are between 8 & 8. 5." Please note: the XS Kids runs small. If you size at exactly 6. 5" we recommend sizing up to a S Lemon & Line bracelet.