I have all but gone crazy over toilet paper. I used to buy it at my local grocery store, until they stopped running meaningful specials on the 12 roll multipacks. Then I bought Kirkland brand, only to find it wouldn't fit my TP holders (both wall-mounted and floor models)as the rolls were too large in diameter. Then there's the "30 double rolls = 90 regular rolls" marketing jargon. I think I'll talk to an engineer at Texas Instruments and see if they can make a calculator that does all the conversion for you, as numbers of ply, sheet size and sheets per roll all factor in. We had some "back stock" of two different kinds and one was clearly about 20% smaller in roll size, so as a former Sales Manager of mine once said "50 off what?"