Griffin Technology Berry Crush Sleep Sport Band for Fitbit, Misfit, and Sony SmartBand Brushed nylon band adjusts to fit wrists up to 8.27 (21 cm) around. Included extension converts wristband to armband that fits arms up to 16 (40.6 cm) around. Inline pocket holds Fitbit Flex, Fitbit One, Fitbit Zip, Misfit Shine, Jawbone UP MOVE, Sony SmartBand or other trackers 28 mm wide X 48 mm tall X 10 mm thick. Compatible with: Jawbone UP MOVE, Fitbit Flex/Fitbit One/Fitbit Zip, Misfit Shine, Sony SmartBand"