Rolls of batting are great. Only problem I've found is where to stash it when not in use as they are huge. I finally came up with the idea to hang it on the ceiling over my cutting table. As my sewing room is in the basement and the rafters are open this was not a problem. I picked up a 2 inch diameter dowel, screwed in an eye bolt on each end, another extra long eye bolt on each end on the rafter above and connected the dowel eye bolt with a clip so easily disengaged when I need to add a new bolt. Can't think what the clip is called but you can get them at most any hardware store. They're all metal and you can open it by pushing the side in and it springs back closed.
Anyway, when I need to cut some off, I know my cutting table is 6 feet long so I pull the batting to the opposite end and pull till I have enough and then use the edge of the cutting table as my cutting line.