PARIS (AP) — The French government announced a new rule on Friday that will require stores to tell customers when a product becomes smaller but its price stays the same or increases, a practice known as ‘’ shrinkflation. ''

Finance Minister Bruno Le Maire announced the measure to tackle the common but often criticized method, which has become an international buzzword. He said that from July 1, such cases will need to be clearly communicated to shoppers.

Le Maire called shrinkflation a “scam” and stressed the importance of transparency. “Consumers must understand the real price evolution of products when their sizes change,” he said in a statement.

Retailers at medium to large supermarkets will have to display specific information about the price per unit and any changes in quantity next to the affected products. It must be visible as signs on store shelves for two months following any changes to a product. This requirement applies to a wide range of goods, including food and household items. The Finance Ministry said there would be exceptions for unpackaged food items and bulk goods.