Funny, I just cut out 4 pairs of them for the swap, lol.
It's my own pattern. I took apart a pair of Eli's big sister's panties to get the basic shape for his trainers. I now have size 1/2, 3/4, and 5/6 drafted. I sell the finished product for $6/pair.
Kwik Sew also makes a pattern for underwear.
