5x7 - I've got about 15 good ones. 5x12 - 3. I got 3 when I got the camera, and that was all I could afford at the time. I wish I had at least 3 more; 7 more would be lovely for an even 10 holders. I shoot a bit more prolifically than some ULF folks, in part because 5x12 is not THAT big so it's easy to look around and move and reset the camera if I see something interesting, and it isn't THAT expensive to feed either.