I was commissioned a while back to help a friend out with his sporran, and just recently got the chance and materials to complete it. The belt he has for it is nothing special - a simple chain attached to belt leather with a buckle in the back, and two clasps attaching to the pouch. Understandably, he wanted something with a little more personality.
I honestly do not remember the stats on these rings, so I am going to take a guess with BA 18ga 5/32" ID. The two clasps are taken from the old belt, and the weave is box chain with a few byzantine flourishes.