Features:
20mm strap fit for these models:
for Samsung Galaxy Watch 5 40mm 44mm;
for Samsung Galaxy Watch 5 Pro 45mm;
for Samsung Galaxy Watch 4 40mm 44mm;
for Samsung Galaxy Watch 4 classic 42mm 46mm;
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;
for Huawei watch 2,
for huawei watch gt 2 42mm band;
And other traditional watches with standard "20mm" lug width.
22mm strap fit for these models:
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 gt 3 46mm band;
for amazfit gtr 47mm;
And other traditional watches with standard "22mm" lug width.