Wearing a NATO Strap
For a first time wearer, a NATO strap can seem a little confusing. The straps were purposely designed to be long, so the excess tail of the strap could be doubled back and tucked into the keepers a second time.
The beauty in this design is the strap is "one size fits most." Small to medium-large wrists can tuck back the excess. Large wrists might not have enough excess to tuck back, but that's okay as well, as the strap tip will terminate close to the second keeper in this case.