I bought some pretty loud knee sox on clearance. The idea was to make baby leggings out of them.
So here's how it goes... First cut them off at the heel.
Then cut off the toe.
Take that short piece you just cut between the toe and
the heel and fold in half, wrong sides together. Pin.
Now pin that piece to the cut end of the long of the stocking.
Sew them together using a stretch stitch.
Should look something like this. (I serged them but don't have a picture.)
If you don't have a serger, just zigzag the seam.
The finished leggings. You could embellish them if you like.