At 5'1" you'd be greatly served by one of SLD's "Starter" 10' 1.3 oz fabrics. Plenty light and a great value. I'm sure Jared would make you a 9' if you wish to save a few more grams. At your height I don't see why 9' wouldn't work for you.

There's an 11' one of these in the For Sale section right now.

I happily used Hummingbirds Tree strap/whoopie dealio for a few years.