You'll need a good flexible ink for the soft PVC tags, I use a 2 part pad printing ink (Transtech type "PH") made for rubber loaded up with a bit of retarder. I have some tiny screens from a pen printing machine, I could burn your art onto one and mail it to you, free, I have more than I'll ever need. They are about 7" x 4" Nice high mesh count for detail work, plus you usually don't need a thick ink deposit with graphic inks to get decent opacity.