Choosing an Apple Watch band isn’t just about style — it's essential to ensure the model you select is compatible with your watch size. At ETERNEL, we design premium leather bands that are carefully crafted to fit all Apple Watch generations, from the Series 3 to the latest Ultra and Ultra 2 models.
Two size families: small and large Apple Watch
Apple has always offered its smartwatches in two size formats. While the exact dimensions vary slightly across generations, they fall into two main categories:
- Small sizes: 38 mm, 40 mm, 41 mm, 42 mm
- Large sizes: 42 mm, 44 mm, 45 mm, 46 mm, 49 mm
The key is to choose a band made for the same size family as your Apple Watch. A band for 41 mm will also fit a 38 mm or 40 mm model, as the attachment system remains identical.
ETERNEL Band Compatibility Table
| Apple Watch | Compatible ETERNEL Band |
|---|---|
| 38 / 40 / 41 / 42 mm | Small size bands |
| 42 / 44 / 45 / 46 / 49 mm | Large size bands |
Cross-compatibility: what it means in practice
A band designed for a 45 mm Apple Watch will also fit a 49 mm Ultra model. Likewise, a 38 mm band remains compatible with a 41 mm version. The differences are purely dimensional — the attachment mechanism is standardized.
ETERNEL: premium bands made to last
All our leather bands are made in France, with a focus on compatibility and superior finishing. Each model is available in two formats: small and large. This lets you easily choose a band that perfectly fits your watch, while enjoying full-grain leather of the highest quality.
A universal attachment system
All ETERNEL bands use custom adaptors designed to slide seamlessly into your Apple Watch case, regardless of the generation. These adaptors are tested to ensure a secure fit with no play and provide a smooth, aesthetic integration with the watch’s curves.
How to find your Apple Watch size
- Look on the back of your watch case — the size is engraved in millimeters.
- You can also check in the Watch app on your iPhone.
- Then refer to our product pages — each band clearly indicates whether it fits small or large sizes.
Need help?
Our customer support team is here to help you choose the perfect band, one that’s compatible with your Apple Watch and reflects your style. At ETERNEL, every detail counts — from the clasp to the stitching.
