[Snowman]

Some of you guys aren't thinking this through.

Take a card and a ruler and hand them to your 19-year-old son or daughter. Ask them to measure it within 1/64" and to write down what they get. Then take that same card and ruler and hand them to 5 of their friends and ask them to do the same. If even two of them come back to you with the exact same measurements in both directions to 1/64", you'd be lucky.

Next, take a card that is just slightly bent (not warped, but just bent ever so slightly like half of your collections probably are) and then scan it raw on a flatbed scanner. Then measure the card with a ruler and compare the dimensions. You'll discover that the dimensions you get from the scanned card are smaller than the card itself because it wasn't flat when it got scanned. And smaller by enough to matter too.