Aarav Apple Silicone Floral Two-tone Watch Band

Apple Watch Band Size Compatibility Guide

Compatible Size Combinations	Compatible Models	Case Size
38mm丨40mm丨41mm丨42mm	Apple Watch	38mm
	Series 1
	Series 2
	Series 3
	Series 4	40mm
	Series 5
	Series 6
	SE
	SE2
	SE3
	Series 7	41mm
	Series 8
	Series 9
	Series 10	42mm
	Series 11
	Series 12
42mm丨44mm丨45mm丨46mm	Apple Watch	42mm
	Series 1
	Series 2
	Series 3
	Series 4	44mm
	Series 5
	Series 6
	SE
	SE2
	SE3
	Series 7	45mm
	Series 8
	Series 9
	Series 10	46mm
	Series 11
	Series 12
44mm丨45mm丨49mm	Ultra	49mm
	Ultra 2
	Ultra 3
	Ultra 4

Core Principle: Two Main Size Categories

Apple Watch band compatibility can be simply divided into two series: Small Sizes and Large Sizes.

• Small Size Universal Series (38mm / 40mm / 41mm)

  • If you have an Apple Watch with a 38mm, 40mm, or 41mm case, then all bands on the market labeled with these three sizes are interchangeable. For example, a band designed for a 41mm Series 9 can be installed on an older 38mm Series 3.

• Large Size Universal Series (42mm / 44mm / 45mm / 49mm)

  • Similarly, if you have a watch with a 42mm, 44mm, 45mm, or 49mm (Apple Watch Ultra) case, then all bands labeled with these sizes are also interchangeable. For example, an Alpine Loop designed for an Apple Watch Ultra (49mm) can also perfectly fit a 44mm Apple Watch SE.

 

How to Check My Apple Watch Case Size

The fastest way is to turn your watch over. Around the circle surrounding the heart rate sensor, you will see engraved text that clearly indicates your case size, such as "41MM" or "45MM".

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