The bellies at my Costco are around 10 pounds. I cut them in half for curing/smoking. Sometimes in thirds so the slabs will fit my slicer. You don't want a tight bag, so leave some space in there when you seal it. I like to squish the bag around and redistribute the cure when I flip it. I'm not sure about stacking the slabs after smoking in the fridge. I would try to keep some air space, but if you stack them, give them a flip every now and then.