I did touch on a moment of guilt, cutting into an otherwise completely wearable garment. Having said that, when I located a store label inside the jumper marked as 'poly-knit', I didn't feel as bad as I would have done cutting into a home knitted jumper.
This is an incredibly easy project to do, cut off sleeves, and neckline. Sew sides shut (I serged with my overlocker, but you don't have to), add casing and elastic to the top of the skirt and leg warmers, and you're done.
4th Feb 2013: Shared with Brassy Apple's IspyRefashion - Skirts