Which Apple Watch fits the 38–42mm hub?
Apple Watch bands are sold by case size, not by Series. This hub bundles every smaller model — Series 1, 2, 3 (38 mm), Series 1, 2, 3 (42 mm legacy), Series 4, 5, 6 (40 mm), SE 1, SE 2, SE 3 (40 mm), Series 7, 8, 9 (41 mm). Apple kept the pin mechanism cross-compatible across the years — a 40 mm band fits any 38/40/41 mm watch (Series 1–9 + SE 1/2/3). The legacy 42 mm case (Series 1–3) is mechanically different from the modern 42 mm of Series 10/11 — for that we have the separate 44–49mm hub.







