20mm: For Gear s2(classic),galaxy watch 42mm, vivoactive3, vivoactive3HR, vivo move HR, vivomove ect... And other traditional or Smart Watches with standard"20mm"lug width.
22mm: For Samsung Galaxy Watch 46mm,Samsung Gear S3 Classic/Frontier,huawei watch gt strap, huawei watch gt 2 46mm band,huawei watch gt 2e ect... And other traditional or Smart Watches with standard"22mm"lug width.