When I bought my current belt, I had to get the biggest one the Big-and-Tall store had and, at first, I wore it on the very last hole. Now after losing 25 pounds, I can comfortably wear it on the second to last hole instead. The holes seem about an inch apart, so I figure that means my waist is 59 inches now -- 26 inches from my goal. I do have a real tape measure somewhere, but I can't seem to find it.
The bad news is that when I need to carry something, I now pull the belt tight enough that I'm using the very last hole. Because of the style of belt, I won't be able to punch my own holes in it. More weight loss means I'll need a new, smaller belt. Oh, I guess that really isn't bad news at all.