New one Pound coin, to size

I needed to print a one pound coin for the gym locker, and the one I found on this website wasn't quite the right size.

So I decided to make my own, with the exact diameter and thickness of the new pound coins.

I made a small hole to put a lanyard for a keychain.

EDIT: Jan 2025: I improved the design a bit by making the hole slightly wider and filleting the edges to make it less likely to catch in the gym locks.