I worked for a furniture maker many years ago, (I'm an upholsterer) and regularily went to a supplier to pick up foam. Found out they were willing to sell me rolls of Fiberfill, so for a while I was supplying our aquarium society with filter floss. The rolls were about 5 1/2' tall, and about 4' across. I had a little Capri at the time, and one roll filled up the back seat and spilled over into the front! Forget exactly what I paid for a roll, but it was under $20. Wish I could still get them!
John