This may seem like a small thing, but add up enough of these small things and it's no wonder people can't afford groceries and household supplies anymore.
I noticed when I changed the toilet tissue roll the other day (opened a new package of tissue to do it) that the roll seemed narrower. I thought I was imagining it until I compared the old, empty roll to the new, full roll. The old roll measured 4 1/2" wide and the new one measures 4 1/8" wide. That's 3/8" that the manufacturer has cut off the roll while not lowering the price (so you're paying the same price for less toilet tissue). Just like cereal producers have created smaller boxes of cereal and kept the same price (10 oz where it used to be 12, or 12 when it was 14, etc).
I've been noticing this a lot at the grocery store lately. A lot of items are getting downsized in quantity but not in price (and a lot of the time, the packaging isn't getting downsized to reflect the lesser quantity inside). You don't realize until you open the new package and see how little is really inside that you've bought a downsized product at the old price (and compare the new box to the old box and see that the quantity has changed while the size of the box and the price hasn't).
I consider this a most dishonest way of increasing prices for products. Manufacturers know consumers watch prices closely, and complain about rising prices, so in order to sneak in a price increase, they think, "Let's not actually raise the price where they can see that it's gone up, we'll just put less product in the same size box, charge them the same amount, and we'll get our price increase without them noticing it quite it as soon. And by the time they do notice it, they'll be so used to paying that same price for less product that they'll keep on doing it." When all the manufacturers do it, comparison shopping for the best price doesn't do much good (but I still do it as much as possible, because every penny, nickel, dime, and quarter I save on groceries can be saved for other things we want or need).