Baaletc Classic Replacement Accessory Band/ Wristband Bracelet Strap Bundle for Fitbit Alta/ HR Fitness Tracker, Large, Pack of 6 Compatible with Fitbit Alta tracker and works great Snap as securely as the original fitbit alta band Available in multi colors/ patterns, you can match up with your outfits Large size: 6.7" - 8.1"; Small size: 5.5" - 6.7", select the correct size for your wrist Package includes accessory bands only, not include other parts