Apple Watch Strap Size Guide
Finding the right strap size for your Apple Watch is easy — you only need to check one thing – the number printed on the back of your watch
Step 1: Turn your Apple Watch over
On the back of your Apple Watch (around the sensor circle), you’ll see small writing that includes your case size — for example:
“Apple Watch • Series 8 • 41mm Aluminium Case”
or
“Apple Watch • Series 9 • 45mm Stainless Steel Case”
Step 2: Match that number to our strap options
Simply choose the same number from our size selector when you order your strap.
- If your watch says 38mm, 40mm or 41mm, select the 38/40/41mm option.
- If your watch says 42mm, 44mm, 45mm, 46mm or 49mm, select the 42/44/45/46/49mm option.
That’s it — no need to worry about case groups, connectors, or compatibility.
As long as you match the number on the back of your watch, your new strap will fit perfectly.
Quick tip
If you’re unsure or can’t read the engraving clearly, you can also check your iPhone:
- Open the Watch app → tap My Watch → tap General > About → look for “Case Size.”
In summary
- Check the number (mm) on the back of your Apple Watch.
- Select that same size when ordering your strap.
- All our straps are designed to fit exactly as Apple intended — no stress, no guesswork.