Do 45 mm Apple Watch bands fit a 46 mm Apple Watch?

Yes. Apple lists bands for 46 mm cases as compatible with 44, 45 and 46 mm cases, and said at the Series 10 launch that older 45 mm bands fit the new 46 mm case.

Official page: Apple

What the makers say

• Apple Support lists bands for 46 mm cases as compatible with 44 mm, 45 mm and 46 mm cases.

  Official page: Apple

• When it launched Series 10 (42 mm and 46 mm), Apple said older bands, including 41 mm and 45 mm sizes, are compatible with the new 42 mm and 46 mm cases, and that new 42 mm and 46 mm bands are compatible with older models.

  Official page: Apple

• Apple Support lists bands for 49 mm (Ultra) cases as compatible with 44 mm, 45 mm and 46 mm cases.

  Official page: Apple

Full band size tables

• Apple Watch band size table

Related questions

• Do 44 mm Apple Watch bands fit a 45 mm Apple Watch?Yes
• Do regular Apple Watch bands fit the Apple Watch Ultra?It depends
• Do 41 mm Apple Watch bands fit a 45 mm Apple Watch?No