Well a few weeks ago I went to Target and bought girls knee socks in cool colors and patterns and just cut off the feet. I have ZERO sewing skills so I didn't even hem them. They were $6.99 for 3 pairs of girls knee socks and they came out of the wash with NO fraying at all.
There you have it!! Cheap Babylegs. Everyone at the pediatrician's office loved them and couldn't believe I DIY'ed them. And they make diaper changes a breeze.