The shrinking products bother me most, because that’s an increase they’re trying to impose surreptitiously.
Examples: tuna cans from 6oz to 5oz, store brand yogurt from 8oz to 6oz, “half gallon” ice cream from 2 quarts to 1.75 quarts to now 1.5 quarts, Haagen Dazs pints now 14oz.
At least some toilet paper is narrower than before which was obvious when seeing some older and newer product stacked together. There are no doubt dozens of other products that have shrunk.