Soft TPU Smart Watch Replacement Strap for Fitbit Charge 4/Charge 3/Charge 3 SE - Dark Brown Eco-friendly soft TPU material, wear-resistant and comfortable to wear Multi-color for option, meeting different style need Classic metal buckle, no slipping-off problem Multiple holes design for easy adjustment of size An ideal strap replacement for your old, broken one Specification: Material: TPU Length: 133+105mm Width: 22.6mm Wrist circumference: 6.5-9 inches Compatible with: Fitbit Charge 4/Charge 3/Charge 3 SE Package included: 1 x Watch Band Other items not included Koko: 150-205mm (ilman kelloa)