It is compatible product for Fitbit Flex 2 -Large Size : Length around 170mm - 206mm ( 6.7 inch - 8.1 inch )-Wristband Length can be adjusted according to the circumstance of individual wrist and Suitable for the wrist size: about 170mm - 206mm ( 6.7 inch - 8.1 inch )-Softness is moderate, wear very comfortable -Compression molding, sturdy and durable -Material: Premium Soft Silicone Package include :1 x Silicone Wristband Note : Tracker is NOT included.