Will Apple Watch 10 bands work with the new Apple Watch 11 models?
Not really loving any of the new Apple Watch 11 bands, can I still use my 45mm Apple Watch 10 band on the new 11 model?
Apple Watch Series 9, watchOS 11
Your Apple Watch Series 10 is a 46 mm model (if it's not the 42 mm model.) Here are its specs: Apple Watch Series 10 - Tech Specs - Apple Support.
The Apple Watch Series 11 offers the same sizes (46 and 42 mm) as the Apple Watch Series 10: Apple Watch Series 11 - Technical Specifications - Apple.
So the bands will be perfectly compatible on the 2 models.