20MM:

for Samsung galaxy watch 4 44mm for Samsung galaxy watch 4 classic 46mm for Samsung galaxy watch 4 40mm for Samsung galaxy watch 4 classic 42mm for Samsung Galaxy Watch 3 41mm

for Samsung Galaxy Watch 42mm

for Samsung Galaxy Watch Active2(40mm 44mm)

for amazfit gtr 42mm

for Samsung Gear S2 classic, Gear Sport; Huawei watch 2,huawei watch gt 2 42mm band

And other traditional or Smart Watches with standard"20mm"lug width.  

22MM:

for Samsung Galaxy Watch 3 45mm

for Samsung Galaxy Watch 46mm

for Samsung Gear S3 Classic

for Samsung Gear S3 Frontier

for huawei watch gt strap

for huawei watch gt 2 46mm band

for amazfit gtr 47mm

And other traditional or Smart Watches with standard"22mm"lug width.