We'd love to, but unfortunately it doesn't make sense for us for a few reasons:
1 - It would double or triple the space we need to store and fulfill products.
2 - Decrease efficiency in how orders are sent out.
3 - 95% of customers are happy with the Strap sizing. Of the 5% of people who are unhappy, about half say they're too small and half say they're too big, so we'd be adding a ton of extra work to make 5% of people a bit happier.
If you need wristbands with sizing, we highly recommend checking out our Imperials. :)