A couple of years ago, I got these lovely knee-length socks in the Sockapalooza sock exchange.
Problem was, however, they were knit without negative ease so perfect fit quickly became feet too big and socks falling down. Oh no! What to do?
A little ingenuity, a littel elastic at the top, some careful unpicking and re-knitting of ribbing, and I've got legwarmers instead. Yay!