Cute Silicone Replacement Wristband Bracelets Bundle/Accessory Bands Pack with Watachband Style Buckle for Fitbit Flex Wireless Activity and Sleep Tracker, Free Size Replacement bands designed to fit Fitbit Flex Wristband Trackers, looks pretty cute Non-fading, durable Silicone material, skin-friendly and comfortable fit day and night Watchband style closure design, the buckle& loop will secure your Fitbit from falling or loosing One size but adjustable to fit both mens and womens wrist (153mm - 210mm/ 6.02 inch - 8.27 inch) 30 days money back guarantee& 30 days warranty. 100% customer satisfaction guaranteed!