I used light pink (light weight) twill and I made a size 7 straight out of the envelope. I love them! The princess likes them, too.
Here is a closeup of the front pocket with the elastic casing. I love this little detail.
Here is the side cargo pocket, complete with rhinestone applique, double topstitching, and the grosgrain drawstring. The pattern called for making a self fabric drawstring, but yeah, I'm a little too lazy for that. Besides, the slightly darker pink ribbon with white running stitch just looks fancier.
Here's the back. It's pretty plain. I am definately going to make these again. The Princess also likes the little top included in the pattern so we're going to make that, too.
You can see the complete review for the cargo pants here on Pattern Review.