Don't you love finding new uses for old things! As I was about to toss the neck part of a turtle neck I didn't use I thought 'that looks like the right size to fit Ava's waist'... Then YOGA SKIRT hit my mind! :)
Since the top portion was made for me all I did was serge it to the top of another piece of fabric! Keep it even easier and use the bottom of an old t-shirt! I did alter the width of the bottom of the t-shirt I used. But aside from that I kept the bottom of the hem on the t-shirt to keep the look finished!
As I got ready to sew up the skirt, I put the t-shirt portion (inside out) on the inside of the turtle neck. I then went to my serger and began serging and pulling on the turtle neck material- not the t-shirt. You can see the stretch in the pictures.
You can see it works out perfect that the hem will be under the waistband, not itching the child.
**My child is just over a year old, the short pictured are size 12 months- we have room to grow! This may or may not work for older children unless you find a large turtle neck at your local goodwill or thrift store!