I've been working on some Z'oodles lately. These are the two I finished, I have a few others that are in process and will show those as soon as I get them done.
These Z'oodles were created on 8.5" x 5.5", 70# pen and ink paper with a Micron 03 pen. I prefer to use the 3mm pen for my drawings, it moves over the paper easier for me than a 1mm tip. Check out Zentangle for more information on drawing your own cool doodles.