Fits 20mm smart watch compatible models:
[Samsung Gear S2 Classic/ Sport/Galaxy watch 42mm/ active/ active 2 44mm and 40mm]
[Fossil Q Gazer]
[Huawei Watch 2/watch2 pro/ Huawei Watch GT 2 42mm] [Moto 360 2nd Gen Men's 42mm]
[Pebble Time Round Large] [Withings (Nokia) Steel HR & Steel HR Sport 40mm]
[LG GizmoWatch]
Fits 22mm smart watch compatible models:
[Samsung Galaxy Watch 46mm] [Samsung Gear S3 Classic / Frontier]
[Huawei Watch GT 2 Classic / Huawei Watch GT 2 46mm] [Asus ZenWatch/ZenWatch 2/Asus Vivowatch]
[Fossil Q Founder 2.0 / Marshal / Wander / Crewmaster / Explorist / Commuter / Grant]
[Moto 360 2 (2nd Gen, 46mm 2015) ] [LG Watch / Urbane / R / W7]
[Pebble Classic / Time / Time Steel / 2 / 2 SE]