Tutu for Miss Boo-boo Tutorial

Miss Boo has been taking ballet lessons for the first time, and since she is in all things Diva Personified, she insisted that "she needed a tutu or she could never show her face again" (followed up with a dramatic wilting sigh of unspeakable sorrow and woe).
Tutus cost around $15 at K-mart, but I figured I could make her one that would cost less and be a little more cute.

To start, measure your Ballerina's tummy. You'll want the tutu to be twice the width of her tummy. (I'm using the pronoun "her" because while I know there are plenty of young men who do ballet, so far as I am aware none of them wear tutus.) My daughter is 4 and a 3/4 yard of fabric was plenty.
You will need two strips that are the same length, but one will be wider than the other by two inches.
If your fabric is the kind that might fray, I'd suggest hemming both strips before you go any further. It's much easier to hem the strips before they're all bunched up and ready to dance off the sewing table.
Sew both strips together (one on top of the other) lengthwise. Then, roll that sewn edge down about 1/2" to create a tube for the elastic.
Sew down the edge of the tube with a zig zag stitch, leaving about two inches unsewn so that you can insert the elastic into the tube.
Referring to the measurement of your Ballerina's tummy, cut a length of elastic just slightly smaller than that measurement. (Side note: if your fabric is thicker, you might need to shorten the elastic even more so that it pulls the fabric tight enough to stay up. Oh to be young and not have hips that could hold up ten hula hoops!) Use a safety pin to help you slide the elastic all the way through the tubing, being careful not to pull the end into the tubing.
Once your elastic is through, sew the ends of the elastic together and finish sewing the tubing down.
That's it! Prima Ballerina ready!