Yes, the Ruffled Rhumba skirt tutorial has all the info you need. The width for the skirt is just however it comes on the bolt-- somewhere between 42-45 inches. I've made skirts sizes 2T- 8 and the width is fine for all of them. Then you just measure the length for the individual child.
Here's the YouTube link: http://www.youtube.com/watch?v=LS-H1duvu VU 2105 days ago