Rosa has bought the same brand of coffee for years. The bag looks the same. The price is the same. But lately, it seems to run out a few days sooner. She checks the label: the bag that used to hold 12 ounces now holds 10.5.

That is shrinkflation, a word for a product getting smaller while its price stays the same or rises less than the size fell. It is a quiet way for prices to go up, and it is easy to miss.

Why it is a price increase

Prices only make sense per unit. If a 12-ounce bag costs $9.00, the price is 75 cents an ounce. If the bag shrinks to 10.5 ounces and still costs $9.00, the price is about 86 cents an ounce. That is an increase of roughly 14 percent, even though the price tag did not move.

Companies may shrink packages for several reasons, including rising costs for ingredients, packaging, transportation and labor. Shrinking a package can feel less noticeable to shoppers than raising a familiar price. Critics argue that this makes it harder for consumers to compare prices and notice increases.

Does official inflation catch it?

Many people assume the official inflation figures miss shrinkflation. In the United States, the main measure, the Consumer Price Index from the Bureau of Labor Statistics, is designed to account for it.

When BLS data collectors price an item and find that its size has changed, the index adjusts for the change in quantity. A product that shrinks from 12 ounces to 10.5 ounces at the same price is treated as a price increase in the CPI. BLS has published research and explanations on this, including an analysis of how often package size changes occurred in recent years and how they affected certain categories.

That does not mean every individual's experience matches the official number. The CPI measures an average basket of goods and services for urban consumers. Your own basket might include more of the products that shrank. But in general, the official index is not blind to smaller packages.

Where shrinkflation shows up

Packaged foods and household products are common examples, because they come in standard sizes that companies can adjust. Common patterns include:

  • Fewer items in a pack. A box of tissues with fewer sheets, a package of cookies with fewer cookies.
  • Lighter weight or smaller volume. A bag of chips, a carton of ice cream or a bottle of detergent that holds slightly less.
  • Same container, less inside. A bottle with a deeper indentation in the bottom, or a box that is a little thinner.
  • Concentration changes. A cleaning product or juice that is more diluted.

There is a related idea sometimes called skimpflation, when the quantity stays the same but the quality or service goes down. Examples might be a cheaper ingredient in a recipe or fewer services included in a price. That is much harder to measure.

How to spot it

Check the unit price. Many stores show a unit price on the shelf label, such as price per ounce, per sheet or per count. Comparing unit prices is the most reliable way to see the real cost. Rules about unit pricing vary by state and country, so it is not always shown.

Read the net weight or count. It is printed on the package. Snap a photo of a product you buy often, and compare it the next time.

Watch for "new look" packaging. A redesign sometimes comes with a size change.

Compare across brands. Store brands and competing brands may not have shrunk, or may offer a better unit price.

Keeping your own record

Shrinkflation is one reason a personal price log can be useful. Write down the price and size of a few things you buy regularly: coffee, cereal, detergent, a favorite snack. Every few months, check them again. Calculate the price per unit each time.

This turns a vague feeling that things are getting smaller into actual numbers. It can also help you decide when to switch brands, buy in bulk or change where you shop.

Policy and disclosure

Shrinkflation has drawn the attention of lawmakers and regulators in several countries. Some governments have considered or introduced rules requiring retailers to notify shoppers when a product's size has been reduced. In France, for example, a rule took effect in 2024 requiring certain stores to display notices on products that have shrunk without a corresponding drop in unit price. Rules differ by country and change over time, so the protections where you shop may be different.

The bottom line

A smaller package at the same price is a price increase, just a less visible one. The official CPI is designed to capture it, but your own experience depends on what you buy. The best defense is simple: check unit prices, look at the weight or count on the label and keep a small record of the products that matter to you.

Rosa did. She switched to a different brand of coffee, at a lower unit price, and started buying the larger bag.