Sports Bi-color Watch Band Breathable Silicone Strap for Apple Watch Series 7 41mm / 6/5/4/SE 40mm / 3/2/1 38mm - Black / Red Two tone design, modern outlook Soft silicone material with holes, fast heat-dissipation, comfortable to wear Safe and eco-friendly material, no harm for body The size can be adjusted according to the circumstance of individual wrist Specification: Material: silicone Length: 12+9cm Wrist circumference: 5.5 - 8.1inch Compatible with: Apple Watch Series 6 40mm Apple Watch Series 7 41mm Apple Watch SE 40mm Apple Watch Series 4 40mm Apple Watch Series 5 40mm Package included: 1 x Bi-color Silicone Smart Watch Band Other things not included Size: 125-190mm (Without watch)