For wrist size, please measure your wrist without any slack or gaps and round up to the closest 1/2’’ I have a formula that adds on for the bracelets thickness to make the perfect fit . Due to the thickness of the cord, finished bracelets are longer than your wrist measurement, so please DO NOT measure an existing bracelets or add extra length. Bracelets are all made to order and can not be resized once they are finished. If you have any questions, please ask before ordering.