At Astra Bandjes, all our straps have clear and specific sizing information. Check the size chart below before ordering. Still unsure? Click here. contact us.
1. How do I know my wrist size?
Simply wrap a flexible measuring tape around your wrist and note the measurement on the tape where the zero end overlaps. OR simply use a piece of string or paper to do the same and then place the string on a ruler to get your precise wrist size.
In most cases, knowing your wrist size/height is sufficient. Compare your wrist size to the size of the strap you're looking to buy on the individual product detail page.
From there you can select and purchase our watch straps: Small (S), Large (L) or Free Size.

2. What is the watch strap width / watch lug size?

In some cases, knowing your wrist size alone may not be enough. In such a scenario, you'll need the watch's strap width, also known as the lug width.
The size of your Apple Watch is printed on the back.

If you can't find the size on the back, place the watch face up and measure the distance between the lugs (where the strap fits).
For Apple Watches, you can choose between 38MM, 40MM, 41MM, 42MM, 44MM, 45MM, and 49MM. You can also enter your watch model number into a search engine to find your watch's size.
Apple Watch 7, 8, and 9: The Apple Watch Series 7, 8, and the newly released Series 9 are compatible with a wide range of our straps, including sizes 38MM, 40MM, 41MM, 42MM, 44MM, 45MM, and 49MM. For watch cases, they fit sizes 41MM and 45MM.
Apple Watch Ultra and Ultra 2: The recently introduced Apple Watch Ultra and Ultra 2 are compatible with 45mm and 49mm bands. Regarding the watch cases, both the Ultra and Ultra 2 models are available in a 49mm size.
With these three measurements you're now ready to grab your wristband!