18 mm: Compatible with Garmin vivomove 3s vivomove 4s Garmin vívosmart HR strap, ticwatch C2 (rose gold dial) Garmin vívosmart HR+ strap, Garmin Forerunner 25 strap (Ladies), honor S1 Samsung Gear Fit2 SM-R360 strap, Samsung Gear Fit2 Pro SM-R365 strap.

20mm compatible with vivomove HR Garmin vivomove Garmin Vivoactive 3/Vivoactive 3 Music, Venu/Venu sq Garmin forerunner 245 music/forerunner 245/forerunner 645 music/forerunner 645

20mm compatible with Amazfit GTS, GTS 2, GTS 2e , GTS 2 mini straps, compatible with Amazfit Bip, Amazfit Bip S, Amazfit Bip U bands

20mm compatible with Samsung Galaxy Watch Active/Active 2 40/44mm , Galaxy Watch 42mm,Galaxy Watch 4 40mm 44mm, gear sport,Galaxy wacth 4 Classic 42mm 46mm, Gear Sport, Gear S2 Classic Silicone , galaxy watch 3 41MM

22mm compatible with Garmin Forerunner 220 235 230 35 620 630 745 735XT 935 945 945 LTE Approach S20 S60 S10 S5 S6 Instinct Vivoactive 4 Smartwatch/ Fitbit Charge 4 Charge 3 Charge 3 SE Charge 2/ iWatch Series SE 6 5 4 3 2 1 galaxy watch 3 45mm 46mm gear S3 ticwatch pro vivoactive 4 Fossil Gen 5Carlyle Julianna Garrett Carlyle HR

AGGDSH 10 Pack Replacement Fastener Ring Compatible with 18mm 20mm 22mm Bands Connector Keepers Fastener Ring Holders Loop for Smartwatc - BWZHQ8MYG