COMPATIBLE --- Fit for all traditional watch and smart watch with 20mm width watch lugs. Fits for Samsung Galaxy Watch 6/ 5 Pro/5/4 44mm 40mm, Samsung Galaxy Watch 5 Pro 45mm, Samsung Galaxy Watch4 Classic 42mm/46mm, Samsung Galaxy Watch 3 (41mm), Galaxy Watch 42mm, Gear S2 Classic/Gear Sport, Galaxy Watch Active 40mm, Galaxy Watch Active2 40mm/44mm, Garmin Vivomove/Vivomover HR/Vivoactive 3/Forerunner645; Huawei watch 2; LG GizmoWatch/Watch SPORT. It's a Adjustable Sport Strap with G-Hook Armband to make it could be length adjustable as you wish (Suitable for fits wrist/arm size 10.1-16.5 inch )no sense of restraint very suitable for outdoor sports such as golf, baseball, camping, hiking, skiing, skating, cycling, fishing, mountaineering, traveling, and field training