I did a couple of test shrinks to get a better calculation on how much it shrinks. My 87 mm piece shrunk to 33 mm. So not exactly 3 to 1. I also printed out a wolf picture and used the photocopier to size it up a bunch of times. Then I found a wolf head that was close to the right size. I cut the shrinky dink out the size you see in the picture. After shrinking, you can see the size of the wolf head. My only problem is the thickness of the wolf head is a bit too much. Sorry the next pic is a bit out of focus, but you get the idea.
I like the detail that is preserved and the ease of production, but don't like the width. So what do you think? Too thick or not too bad. I am undecided. Maybe green stuff would be better, and save shrinky dinks for vehicle icons. Let me know what you think.