This is a free pattern posted on my blog. Excerpt below:

Want to make my super warm and chunky leg warmers for yourself or the 80s child in your life? You’ll need to know how to make a single crochet (sc), double crochet (dc), and back post double crochet (BPdc). If you want them low and slouchy, use two balls of yarn; if you want them longer, use three. The pattern is worked in the round with the wrong side facing you.