A slipped-stitch (roughly) triangular shawl that starts with a garter tab and ends with as many spines of slipped stitches as you want is a perfect showcase for a highly variegated handspun or hand-dyed yarn. This shawl can be made with as little as 325 yards of yarn, or made as big as you have yarn for.

The pattern gives specific stitch counts and instructions, as well as more general instructions for improvisation, is quite forgiving in case of absent-minded knitting (trust me on this), and still yields a gorgeous result.