Native, most of the cork I've seen comes in 17 or 18 inches wide.
I got mine here:
https://sewsweetness.com/?v=4837f1dab735
I'm glad you asked this, Grmrm. I have decided to do this bag, but it uses vinyl-not cork...so I was wondering the same thing. (I love that bag you're making):
https://swoonpatterns.com/shop/blanc...l-bag/?ssp=160
https://www.youtube.com/watch?v=5gxD...4&pbjreload=10
Watson, I love that bag too!