XO Your Sister Fitbit Flex Wristband - Fitbit Flex Replacement Band With Secure Chrome Watch Clasp, Unique Handcrafted 3D XO Your Sister Pattern Made from Premium Silicone, Fitbit Flex Color Bands, Fitbit Flex Accessory Band Replacement wristband for the Fitbit Flex comes with a secure watchband-style closure to keep your Fitbit on your wrist XO Your Sister replacement band is compatible with the Fitbit Flex XO Your Sister watchband is one size and fits most wrists Fit wrists up to 7.25" in circumference Fitbit device not included. Replacement band for the Fitbit Flex only.