Two-color Soft Silicone Watch Band for Fitbit Charge 3 - Black / White Soft silicone material with breathable holes design Non-toxic, allergy-free, comfortable to wear The size can be adjusted according to the circumstance of individual wrist An ideal watch strap replacement for your old, broken one Recommended wrist circumference: 5.5-7.6 inches Compatible with: Fitbit Charge 3 Package included: 1 x Two-color Soft Silicone Sports Watch Band Other items not included Koko: 110-185mm (ilman kelloa)