In reply to localboy:
Mine is about that age too. (Actually I loved them so much I've got two -what will I do when they finally give up the ghost? They're delaminating now but I still use them both regularly.)
I think from memory they're 35 litres, but if not then it's 30 litres. Hope that helps.
Unfortunately IMO nothing is as good as the original KIMM sac, but you could try Deuter Speedlite - (I've bought one recently to eke out the life of my KIMM sacs and it seems fine.) ALso Osprey Talon 33 is a good sac (according to OH)
