There are two size to option: Small 5.5″-6.7″ 140 mm -170 mm, Large 6.7″-8.1″ 170 mm -206 mm.
About The unique design of ultrathin secure fastener:
1. Made with food-grade PVC.
2. Ultrathin designed makes it more comfortable while wearing your fitbit band.
3. Compact designed makes sure the fastener ring protect your Fitbit tracker effectively. At the same, it also sacrifice a little bit of convenience, but it is worth.
Disclaimer: Our Fitbit Alta replacement bands are in NO WAY connected/affiliated to the Fitbit Inc. or to their trademarks “Fitbit”, “Fitbit Alta”, “Fitbit Flex”. We are an independent manufacturer/seller of quality replacement bands.