Written by Lodi
Edited on
8 July 2025
·
15:06
Which Apple Watch size do you choose?
You can choose from different Apple Watch sizes. The Apple Watch Series 10 comes in 42mm or 46mm. The Apple Watch SE (2022/2023/2024) is the smallest Apple Watch in 40mm or 44mm. The Apple Watch Ultra 2 is the largest at 49mm. In this article, you can read what to look out for when choosing the right Apple Watch size for you.
Apple Watch series and sizes
| Model | Size | Wrist circumference |
|---|---|---|
| Apple Watch Ultra 2 | 49mm | 19cm and larger |
| Apple Watch 10 | 42mm | 15 to 17cm |
| 46mm | 17 to 19cm | |
| Apple Watch SE | 40mm | Smaller than 15cm |
| 44mm | 15 to 17cm | |
| 41mm | Smaller than 15cm | |
| 45mm | 17 to 19cm |
Measure your wrist
You can determine the right Apple Watch size by measuring your wrist circumference.
- Wrap a tape measure around your wrist just above your wrist bone. This is the bump you feel on your wrist.
- Don't have a tape measure? Wrap a piece of string around your wrist and mark it where the string wraps all the way around. Now you can use a ruler to measure the distance from the end of the string to the marking.
Which size strap do you need?
When you buy a new Apple Watch SE or Apple Watch 9 or 10, you have to choose which strap size you want. At first, you received 2 sizes in the box. Now, it's only 1. You can choose from:
- Sports band size S/M: for a wrist circumference of 13 to 18cm.
- Sports band size M/L: for a wrist circumference of 15 to 20cm.
- Sport Loop: 1 size for a wrist circumference up to 22cm.
Apple Watch straps
Do you have an old Apple Watch strap lying around? There's a good chance it'll fit your new Apple Watch. You can see which straps fit on which sizes Apple Watch cases.
- Apple Watch 38/40/41/42mm
- Apple Watch 42/44/45mm
- Apple Watch 44/45/46/49mm
It's possible that the colors of the straps aren't the same as the watch case colors or the newer Apple Watch models.
Article by Lodi
Smartwatch Expert.
