Tea towel (unwashed)!
Shrinkage was negligible on the width - maybe a few mm, and 2cm over the length (65cm shrank to 63cm). I still need to hem, but I'll wait until I've finished the warp, then I'll use some of the loom waste as sewing thread.
and the other side
Close ups on the brocade sections:
Unfortunately the blue cotton shrank a bit, making the edges draw in on the bands (I'd hoped it wouldn't, being an embroidery thread). It's not much shrinkage, but enough that I now know to be more careful on the next one.
The awful lines I was getting with my too-coarse reed have mostly gone (thanks to the tedious on-loom manipulation I was doing that took twice as long as the actual weaving). And as of today I have a new 16dpi reed. I'm half way through re-sleying, and I'm changing it to 64 epi (down from 70). That way, even if I do get lines they'll at least be regularly spaced in terms of the pattern.