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Apple
Apple Watch Series 4 40mm
apple-watch-series-4-40mm · confidence 0.90 · verified 2026-08-27
Strap fitment
NativeApple slide-inChecked against manufacturer page 2026-08-27
The band slides sideways into a slot in the case; a small button on the back releases it.
Bands for 38mm, 40mm, and 41mm cases are compatible with each other.
source ↗Known aliases
apple watch series 4 40mmApple Watch Series 4 40mmAW Series 4 40mmWatch Series 4 40mmwatchseries440mm