You can easily adjust the width of these leggings/leg warmers by adding or decreasing the number of rows in the ribbing. You can also easily adjust the length by adding or decreasing the number of rows in the main body of the leg warmers.

I used an H hook, but I tend to have tight crochet stitches, so I recommend a G hook for people following this pattern. I used an acrylic, worsted weight yarn.