I made this on one big circular needle, just knitting round and round until it curled up on itself enough that you don't see the edges. The trickiest part was switching from the white cotton to the grey wool, but as I didn't want the join to be too neat (and I wouldn't have been able to make it neat anyway) I just picked up and worked with both yarns for a few stitches at each join. Then I had to cut the ends and weave them in, which is not my favourite thing, but it made a staggered effect which I'm still deciding on whether I like or not.
