The "Deluxe Noir Series" adds beautiful black enamel noir styling to the terminals. Made of flexi-steel wire and a premium plating process on the terminals. Extremely flexible for easy removal and adjustments. Beautifully packaged in a gift box! The Q-Ray Bracelet come in three sizes: small, medium, and large. 75% of women typically wear a small size. 75% of men typically wear a medium size. We do offer extra small and extra large in select models. Size small is 6 to 7 inches circumference of your wrist. Size medium is 7 to 7 ¾ inches circumference of your wrist. Size large is above 7 ¾ circumference of your wrist.