For those of you that care, both the 46mm and 42mm Galaxy Watch 4 classics run a 20mm band. Some folks (including Samsung support) have been saying they run 22mm. : r/WearOS
Samsung Galaxy Watch 42mm straps
Buy (4 Pack) Leather Band for Galaxy Watch 5 Pro 45mm/4 Classic 46mm 42mm Bands, o.b.o 20mm Watch Strap Compatible for Samsung Galaxy Watch 5/4 40mm
(4 Pack) Leather Band for Galaxy Watch 5 Pro 45mm/4 Classic 46mm 42mm Bands, o.b.o 20mm Watch Strap Compatible for Samsung Galaxy Watch 5/4 40mm
Samsung Galaxy Watch 5 Review
The Samsung Nest Leather watch bands are made with the highest quality leather that is sure to last over a long period of time. * [ High-Quality
Galaxy Watch 4 (40mm & 44mm) /4 Classic (42mm & 46mm) Brown Leather Watch Band
Galaxy Watch 4 Straps – SamStraps™
Samsung Galaxy Watch Active Review: A Great Wearable for Exercise Tracking
TOYOUTHS Leather Strap Compatible with Samsung Galaxy Watch 4 Bands/Ga – Toyouths
20mm Black/Black Barton Quick Release Top Grain Leather Watch Band Strap
Samsung Galaxy Watch Active 2 review: A sleek smartwatch that's better value than the Galaxy Watch 3 - CNET
Maxjoy Compatible with Galaxy Watch 42mm/Galaxy Watch 3 41mm/Active 2 40mm 44mm Bands, 20mm Leather Vintage Hybrid Sports Band Sweatproof Strap Replacement for Samsung Galaxy Watch 42mm, Dark Brown : Cell
With crisp Miami Dolphins graphics, this Groove Life Samsung 22mm Long Watch Band allows you to show off your team pride everywhere you go. The silicone band is both comfortable and durable, and it features inner ''Grooves'' that provide maximum breathability. The classic design and Miami Dolphins logo make it great for everyday wear, including your workouts and other physical activities.
Groove Life Black Miami Dolphins Samsung 22mm Long Watch Band
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Dexnor for Galaxy Watch Active 2 Case with Band 44mm