I know I could buy one but just fancy having a go.
what sort of yarn would you recommend, and what sort of needles? I have it in my head that it would be quite big stitches/holy iykwim, and preferably in a sort of speckly yarn which doesn't show up missed stitches quite as much.
any info gratefully required, in particular how can I calculate how much I need? Am thinking about 5 feet by 4 feet-ish.