I have run really short of yarn for this project. it was bought as a cheap bundle a long while ago and it isn't possible to buy any more.
the back, front and collar/edging are finished. I have 2 balls and some bits left, which doesn't seem a lot. the sleeves are only elbow length but with a turn back cuff. I'm knitting them downwards from the sleeve head and the length will depend on how much yarn there is.