A 38mm Apple Watch band is generallynot compatiblewith a 42mm Apple Watch because their strap sizes are different. A 38mm Apple Watch (Series 0 to 3) will still fit your new 40mm Apple Watch (Series 4, 5, or 6) because Apple has only made a slight adjustment to the new series鈥?case size but has kept the same strap size.
People also ask
Will 42mm bands fit the 40mm Apple Watch Series 4?
I have the Apple Watch Series 4 40 mm, as well as several 42 mm bands from the older Apple Watch Series 1 42 mm. I have heard that the 42 mm bands are supposed to fit the 40 mm watch, so I went to give it a try.
What is the difference between a 38mm and a 40mm watch?
The 38mm and 40mm watches use the same (smaller) range of bands. The 42mm and 44mm Watches use the same (larger) bands. Apple watches are measured by height or display, not diagonal.
What size Apple Watch bands do I Need?
If you have an older Apple Watch Series 0, 1, 2, or 3 Apple Watch, your bands should be for either the 38mm or 42mm case. However, even though the Apple Watch Series 4, 5, and the new Apple Watch Series 6 come in the slightly different case sizes 鈥?40mm or 44mm 鈥?your older bands from Series 3 and earlier will still fit.
Will my old Apple Watch bands fit my new Apple Watch?
However, even though the Apple Watch Series 4, 5, and the new Apple Watch Series 6 come in the slightly different case sizes 鈥?40mm or 44mm 鈥?your older bands from Series 3 and earlier will still fit. This is because when Apple slightly increased the size of the Apple Watch case, they kept the strap sizes the same.