Rip Curl has an usual shape- an asymmetrical curl like a cresting wave. Though it seems odd, it wears like a charm- you can wrap it twice and use the little curly end as a hook to help keep it on! The sample was knit with a gradient set from Hazel Knits, in their delicious "Entice" yarn... but you can of course make it solid or striped, in any fingering-weight yarn you please. Slipped stitch "spines" and "bones" stick out from the garter stitch background to add a little extra geometric intrigue.
(yeah it's upside-down here. I'm a champ. But hey, always nice to have a good-looking wrong-side.)
You can find Rip Curl on Ravelry here, or: