Here's how you can make your own:
Take a hand-me-down sweater (any one will do) and cut off the sleeves at the shoulder seam. Just slash away it doesn't have to be neat.
Now, take the sleeves and cut off the hump.
I had to take in the side a little where the sleeve got bigger for the underarm. Make sure it's nice and snug so it will stay on your leg like it's supposed to.
Lay out your leg warmer and about 3 inches from the smallest part cut half way around to form the stirrup that goes underneath your foot. Hem the top and you viola! You are done!!!
I think there are many more of these to come... SO EASY!