I bought a special kittychan fabric from ebay...it was expensive but worth it *_* <3
Measure from where you want you loose sock to begin until your foot. Then measure around your leg. At the bottom you but more cm than on top. Then draw a pattern. I was lazy and took half-half for my paper pattern.
!!!IMPORTANT!!! In order to put through I string on the top so that the leg warmer won't fall down, you have to put +4 cm instead of only 2cm.
I then copyied it on the farbic and it should turn out like that (I love my fabric <333):
Here you have to leave a bit of space because the string will go through ^O^
Before you sew togehter the sides, be sure to hem the longest side. Then sew togehter the sides.
Be carefull to not sew togehter the part were the string comes out...! Beginn to sew after it.
Then, out through the string or something else and finish! ^O^