Enforcing legal standard weights/sizes for everything that businesses cannot deviate from would be ridiculous... and that wouldn't reduce inflation, either. Li

Enforcing legal standard weights/sizes for everything that businesses cannot deviate from would be ridiculous... and that wouldn't reduce inflation, either. List the price per litre or per kg, for instance, for every item in addition to the item's price and people can then compare between different brands on the shelf. This is already done in many cases though I do not know if there is a legal obligation. People are not stupid by the way, they notice when an item they are used to buy shrinks.