It's 40" around and 9 1/2 wide, but it stretches.
I said I was going to try a special cord but a simple one worked out just fine. I like simple solutions.
And this is what I got today, a bag/box from Intercal.
They had this fat quarter, or 1/4 yard of ultra sparse fabric on sale in a color I like.
So ya know what I get to do when I'm finished the anteater?