For FitBit Flex Wristband replacement Only! Not for Fitbit One or Force or other models Durable, Waterproof Materials, Manufactured by X-TECH Easy-to-wear, Slim, Comfortable Wristband match your daily style, Perfect fit for your Fitbit Flex activity tracker and comfortable wearing experience Fitbit Flex Tracker NOT Included!!! Size:6.5-8.5inch