Compatible Fitbit Alta or Fitbit Alta Hr Fitness Tracker Classic Replacement Accessory Band/Wristband Bracelet Strap 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 include accessory band only, not fitbit original bands