Buckle Bracelet for Fitbit One - Adjustable Wristband and Wristwatch Style - Fitbit One Silicone Replacement Secure Band with Chrome Watch Clasp and Fastener Buckle - Fix the Tracker Fall Off Problem FITS FITBIT ONE ONLY - Specially designed to fit the FITBIT ONE ONLY. Fitbit device NOT included. EXTRA PROTECTION TO YOUR FITBIT ONE - Never lose your FitBit ONE. Fix the tracker fall off problem. ADJUSTABLE SECURE WRISTBAND DESIGN - One size fits most wrists size. Designed to fit most wrists (6.3"- 8.25"). PERSONALIZE YOUR WRISTBANDS WITH WATCH BANDS STYLE - Turn you Fitbit ONE into a watch. Much more than a tracker. A MUST FOR YOUR FITBIT ONE - Simple and functional, keep your Fitbit ONE on your wrist, simple as that.