Tiny, I'm using Tandy's superior lace, 1/8". I use a stitching wheel to lay out the holes, then punch 3/32 holes. The cloth one was a treat, at first I just used the cloth, and it started fraying really bad, so I glued it to the 2oz. leather, and it worked. The magnets are pretty aggresive, they're 9 lb. I was carrying the black one in my front pocket, and got too close to a filing cabinet, and I got stuck....lol.
Greybeard, thanks.