The straps for 38 mm, 40 mm and 41 mm covers are compatible with covers of all three sizes. The straps for 42 mm, 44 mm and 45 mm covers are compatible with covers of all three sizes. The sports band is an adjustable strap made of fluoroelastomer and comes in two sizes to fit smaller and larger Apple Watch models. Because this band has holes for an adjustable fit, you just need to make sure that the size range below matches your wrist size.
The Apple Sport Loop is made of woven nylon with a hook and loop closure. One side is a Velcro-like material that adheres the Sport Loop firmly to the wrist. It doesn't use holes like the sports strap, so you can get an even more personalized fit. Wraparound bands like sports straps are the most tolerant in both situations, and if you have a large wrist, the sports strap and sports strap can fit where other bands don't.
For small wrists, the sports strap can be tightened and offers a better fit than something like a sports strap. The 38mm Apple Watch model can use bands up to 22mm wide and up to 24mm wide for the 42mm Apple Watch. Remember that each Apple Watch band fits an Apple Watch of the same case size. Apple Watches straps that are for 38mm or 40mm cases are compatible with each other.
In addition, watch straps that are for 42 mm and 44 mm cases are compatible with each other. Keep this in mind before you pay for that new watch band. Apple's printed guide provides a comparison of the size of the Apple Watch on the wrists for a powerful visual reference. Made of leather, the modern buckle is the only Apple strap that is exclusive to the smaller 40 and 41 mm Apple Watch models.
With either strap, it's a good idea to go to an Apple retail store if you can to try on and get an idea of the different materials and how they feel on your wrist. It might be obvious to choose the best size for your Apple Watch band because Apple offers two size options, but it's not that obvious at all. The Simple Tour Made in France leather strap, for example, is smaller in white than in gold, some colors are preferred for women and others for men. However, if you use third-party Apple Watch bands, the band may wear out over time.
However, you should know which series your Apple Watch is so that you can match the correct band size. Some women prefer the larger size for their Apple Watch, while other men want an Apple Watch with smaller dimensions on the wrist. Not all Apple Watch bands are available in all sizes and not all are compatible with both models. Apple needs to know that there are people out there whose wrists are big enough for none of their bands to fit.
Apple has conveniently aligned band and face sizes, making the task of choosing a band somewhat easier. The quickest way to find out what size Apple Watch you have is to take the watch off your wrist and look at the engraving on the back.
