These are about the size of half a Hollerith (punch) card. I miss punch cards. They were the perfect size to fit in my shirt pocket folded in half. And they

These are about the size of half a Hollerith (punch) card. I miss punch cards. They were the perfect size to fit in my shirt pocket folded in half. And they were effectively free since everybody was getting rid of them. Sadly, I ran out of my stash about 8 years ago. And now they're not free anymore.