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What size is your
Apple Watch?
Take your Apple Watch off, turn it over, and check the top right of the underside to find your size in millimetres (mm).
38mm (Series 1, 2, 3)
40mm (Series 4, 5, 6, SE)
41mm (Series 7, 8, 9)
42mm (Series 10)
44mm (Series 4, 5, 6, SE)
45mm (Series 7, 8, 9)
46mm (Series 10)
49mm (Ultra 1, 2)
What is your Strap Size?
To find your Strap Size, simply wrap the millimetre (mm) side of a tape measure around your wrist.
Where the tape meets the 0mm mark is your wrist size in millimetres.