You can adjust the watch wristband to fit with the included elements, however unless you are of slender wrist you will have to buy two sets. They just are not made for adult men. LEGOLAND park employees were once-upon-a-time given them to wear, but they had access to the parts to extend the wristband like I said. Out of the box is not necessarily a one size fits most.
There is no life I know to compare with pure imagination. Living there, you'll be free if you truly wish to be. -Willy Wonka, 1971-