This is my realworld test and size comparison on wrist for the Apple Watch Series 9, Ultra 2 and SE across 49mm, 45mm, 44mm, 41mm and 40mm. For simplicity we bundle them into small, medium and large sizes. Enjoy!

0:00​​ Intro
0:27​​ Comfort, Size & Weight
3:02​​ Lifestyle & Identity
4:20 ☀ Screen Size
5:34 Band Choice
6:18​​ Battery Life & Features
7:13​​ ⌚ Price
7:55​​ Recommendations