I made these with my Epson R1900 printer. The same one that was giving me fits this past weekend. They came out so nice. Our personal information is on the other side.
First I found the plastic cards, then I was thrilled to see that there was an actual guide available for my system. At first I was just going to use zip ties to attach them, but found these little clips that made it look so much more professional. And the hole punches I had weren't going to be exactly right for what I wanted, so I got one of these! It punches the perfect size hole for these cards and the clips.
The photos below were all taken on the same day.
Even with the tags on the carriers, Steve and Goose came home with different colored paper collars. And they're still hard to tell apart. Goose's fur is a little longer than Steve's, one is darker than the other and Goose has a more round face, where Steve's is more triangular.
They've grown a lot since then.