I tried stand up paper minis, but wasn't a big fan. I've had a lot of luck with printing my own counters, though. The ink costs can add up over time, but they look nice and I give the token to the player that kills it. I got composition notebooks for everyone and a glue stick, so they each keep notes for every session and combat. Monsters get pasted in after being killed.
RPTools is where you'll find the token editor I use. After googling an image and cutting it down in there, I paste it into an open office document with the stat blocks for the encounter. Size it as 1" for a small/medium creature 2" for large and etc. You can get a 1" circular hole punch from hobby lobby for like $6, or just cut em out with scissors for bigger ones (they make a 2" hole punch that works for large size creatures as well)
If you use slightly thicker than normal paper (not quite cover stock thickness) they don't move around a lot on the battle mat.
Here's an example of a finished encounter
...That was way more than you wanted/needed to know, but I hope it helped!