At the same time I have a black jumper that I bought cheap in the sale (£2.99 I believe) that I like because it has funny wing things on the shoulders but because it is plain black I never wear it as it doesn't really go with any outfits. Jumpers are hard to fit into an ensemble I find.
The solution was so obvious it's only taken me a year to think of it; turn my jumper into a cardigan I can wear at work.
Step one: Lay the jumper down flat and find the center and mark a line.
Step two: cut down the center line.
Step three: Attach bias binding* (I used the satiny kind, and it took a whole meter for one cardigan, and I am 5ft7") to the newly cut raw edges, and sew it in place.
Step four: Measure where you want the buttons to go- I used 6 and space the about 7cm apart, and mark this on both sides of the old center line.
Step five: On one side sew the buttons and on the other cut button holes. I have yet to fathom the button hole stitch on my sewing machine so I cheated. I cut the holes and then used a match to finish off the edges of the holes. The match melts the threads to stop them fraying. Time will tell how well this works!
Step six: sit back and marvel at your finish product.
I also did an old purple jumper that I never wear, but I decided not to add buttons to it. I generally don't like cardigans that don't fasten so I may in the future add another type of fastening to it.
*Bias Binding? It is a strip of fabric usually in cotton or satin that is cut on the bias- that means at a 90 degree angle, which allows it to stretch and therefore go around curves like arm holes or neck lines. The edges are already folded over to give you a neat finish and you simple fold it over a raw edge and sew in place.