Why not pick a pretty shell pattern and just make a rectangle the size you want? Maybe look thru a stitch pattern book and pick a new stitch that catches your eye and try that in a rectangle. For what it looks like you want, that's what I would do.

Tami

I made one of these a few months ago -- not with Vanna's yarn so you could use the yarn you have. Pattern calls for 21 oz but you could make it shorter - Caron has the Perfect Match in 7oz that matches the one pounder. It's pretty but may not be as open as you'd like.

Here is a link that might be useful: Lion Brand - Sweet Scallops Shawl