I mean, I knew it would shrink a bit, that's part of felting. I measured my last bag before and after so that I would get an idea of how much it would shrink. I didn't take into consideration the double strand of yarn I used here and stuff like that, but somehow it shrunk to half the size of the pre-washed piece. It's still makes a cute book bag, but I don't know about toting around my laptop! But this is only my second bag. I have a lifetime of felting ahead of me.