Two-Color Silicone Smart Watch Band Replacement Wrist Strap for Fitbit Charge 3/Charge 4 - Royal Blue / Red Made of premium silicone, durable for use Moderate softness, comfortable to wear Holes on the strap makes it easy to adjust according to your size An ideal watch strap replacement for your old, broken one Easy to install and remove Specification: Size: 130mm+95mm Wrist circumference: 155-225mm Material: Silicone Storl: 135-195mm (utan klocka)