Written by Emme-Lotte
Edited on
5 February 2026
·
16:15
Which Apple Watch size do you choose?
The right size watch case depends on your taste and preferences. It's easiest to test this in the store. For the right Apple Watch, measure your wrist circumference. That way, you can be sure it fits. In this article, you can read what to keep in mind so you choose the right Apple Watch size.
Choose Apple Watch size
Before you choose the size of your Apple Watch, you go through a couple of steps:
Step 1. Choose your watch case size
Step 2. Measure your wrist
Step 3. Choose your Apple Watch strap
Step 1. Choos the watch case size
The right size watch case depends on your taste and preferences. The Watch SE (2025) has a small 40mm case and a large 44mm case. The cases of the Watch Series 11 are a bit larger, 42 and 46mm. Want an extra large watch case? Choose the Watch Ultra 3 49mm. Not sure about the size? Visit the store and try out the various watch case sizes. That way, you can be sure your Apple Watch fits well.
Step 2. Measure your wrist
You receive 1 included watch strap, so make sure you choose the right size watch strap with your Apple Watch. To do so, you measure 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.
Step 3. Choose your Apple Watch strap
Now you know your wrist circumference, you can choose which watch strap suits you best. With your Apple Watch SE, you can choose from a silicone Sport Band and a nylon Sport Loop. You get an extra option for your Watch Series 11, the stylish stainless steel Milanese Loop. The Apple Watch Ultra 3 has various watch straps. Choose an Ocean Band if you swim or dive often. With the thin Trail Loop, you can exercise comfortably. An Alpine Loop stays firmly in place during outdoor sports. Or choose the stylish Milanese Loop.
Apple Watch sizes and watch straps
| Apple Watch | Size watch case | Strap | Wrist circumference |
|---|---|---|---|
| Apple Watch Ultra 3/Ultra 2 | 49mm (extra large) | Ocean Band | Up to 22cm |
| Trail Loop S/M | 13 - 18cm | ||
| Trail Loop M/L | 15 - 22cm | ||
| Alpine Loop S | 13 - 16cm | ||
| Alpine Loop M | 15 - 19cm | ||
| Alpine Loop L | 17 - 21cm | ||
| Milanese Loop S | 13 - 16cm | ||
| Milanese Loop M | 16 - 18cm | ||
| Milanese Loop L | 18 - 21cm | ||
| Apple Watch Series 11/Series 10 | 42mm (small), 46mm (large) | Sport Band S/M | 13 - 18cm |
| Sport Band M/L | 15 - 18cm | ||
| Sport Loop (only Series 10) | Up to 22cm | ||
| Milanese S/M | 13 - 18cm | ||
| Milanese M/L | 15 - 20cm | ||
| Apple Watch SE (2025)/SE (2024) | 40mm (small), 44mm (medium-sized) | Sport Band S/M | 13 - 18cm |
| Sport Band M/L | 15 - 20cm | ||
| Sport Loop (only SE (2024) | Up to 22cm |
Article by Emme-Lotte
Apple Watch Expert.
