I don't like to buy too much toilet paper at once. Even though it is cheaper and it obviously lasts longer to buy 9-packs, or 12-packs, or even 24-packs of toilet paper (all of which are usually sold as double rolls), I prefer to buy the good old fashioned 4-pack of regular-sized rolls of my chosen brand (Angel Soft). And even though I almost never buy more than the diminutive 4-pack, I make sure that I never run out. Toilet paper is too important to let that happen.