The Fitbit Alta HR & Alta small classic accessory band lets you switch up your style & personalize the Fitbit Alta HR or Fitbit Alta tracker. Suitable for workouts & everyday wear, the band is both stylish & durable & has been made from flexible elastomer. It is easy to attach & remove & ensures a soft feel & a secure, adjustable fit. The band is designed for wrists 14cm-17cm (5.5''-6.6'') in circumference.