I just upgraded to Samsung series 4 (44mm) from the Garmin Vivoactive 3. The watch faces are the same size, but the band for the Garmin is way more comfortable and fits
Amazon.com: GEAK Compatible with Garmin Vivoactive 3 Band/Vivoactive 3 Music Watch Band/,20mm Silicone Band for Galaxy Active 2 40mm 44mm Bands/Samsung Gear Sport/Galaxy Watch Band 42mm Watch Women Men Black : Cell
Amazon.com: Garmin 010-01769-01 Vivoactive 3, GPS Smartwatch with Contactless Payments and Built-In Sports Apps, Black with Silver Hardware : Electronics
Strap Garmin Venu 2/vivoactive 4/forerunner 255 Silicone - Temu
Garmin Vivoactive 3 – Body Basics
C2DJOY Garmin vivoactive 3/3 Music Nylon Weave Strap, Quick Release Ba – C2DJOY® Accessories for Garmin
18MM 20MM 22MM Strap For Garmin Vivoactive 3 4 4S Smart Watch Bands Magnetic Loop Wristband