[Compatibility] - You can match this band with any Watch Series 5，Series 4 case of the same size. It also works with all previous versions of Watch, including Watch Series 3. The 40mm band works with the 38mm case; the 44mm band works with the 42mm case.
40MM(38MM) S/M Size: Suitable for 5.1"-7.1" (130mm-180mm) wrist;40MM(38MM) M/L Size: Suitable for 5.9"-7.9" (150mm-200mm) wrist;44MM(42MM) S/M Size: Suitable for 5.5"-7.5" (140mm-190mm) wrist;44MM(42MM) M/L Size: Suitable for 6.3"-8.3" (160mm-210mm) wrist.
Wonderful thrid-party design provides more options to match your Watch.
High Quality material of silicon bring this strap soft and light weight characteristic,hand feeling is very comfortable.
To install this band, you only need to take your original band off and push the new band onto the watch just like how the band works.