How to measure your wrist for size: Take a piece of string and wrap it around your wrist – snug but not too tight. Add approximately 1/2 inch for the right bracelet size. Small = wrist size 5 1/4″ (loose fit) to 6 1/4″ (snug fit) Medium = wrist size 6 1/4″ (loose fit) to 6 3/4″ (snug fit) Large = wrist size 6 3/4″ (loose fit) to 7 1/2″ (snug fit)