When you collect for a long time, you begin to crave unique items that you don’t see all that often. I try to collect every Chris Chelios card that I can find, including offbeat stuff like this 1991-92 Topps Stadium Club proof card. As you can see from the comparison above, the proof (right) is bigger than the standard card. The proof measures 2-7/8″ wide by 3-7/8″ tall — 3/4″ of an inch bigger in both directions. There’s an interesting reason for this.