Shrinkflation: Smaller Packages, Same Price

What shrinkflation is

The Bureau of Labor Statistics (BLS), which calls the practice downsizing, describes it as companies offering "a smaller amount of the product for the same price" in place of a higher list price. The price at the register stays the same. The price per unit rises.

BLS cites snack packs cut from 4.5 ounces to 4.25 ounces and 8-ounce bags cut to 7.5 ounces. At an unchanged price, those changes raise the price per ounce by 5.9 percent and 6.7 percent.

It happens where products are sold in packages. BLS lists potato chips, paper towels, cereal, cleaning supplies and candy among the common cases. Goods sold by a unit of weight or volume, such as gasoline by the gallon or steak by the pound, cannot be downsized. The reverse, upsizing, also happens, though BLS says less often.

The reason is in how shoppers react. BLS cites market research indicating that consumers are more sensitive to a price change than to a size change, and the Government Accountability Office (GAO), reviewing the evidence in July 2025, found research suggesting that consumers respond less to downsizing than to an equivalent price increase. It linked that to subtle packaging changes, infrequent purchases and brand loyalty, and found three studies in which higher-income households responded less than lower-income ones.

How the CPI accounts for shrinkflation

The consumer price index records shrinkflation as inflation. For packaged goods, BLS tracks the price per unit of size, in three steps.

1. Collection. When a BLS data collector finds that an item in the sample has changed size, the collector records the new size, updates the product description and flags the change to economists in the national office.
2. Verification. Economists confirm the change through manufacturers' websites, online retailers and other sources, then search the rest of the CPI sample for the same product and alert collectors to watch for it.
3. Price per unit. For items where size is reported, BLS calculates an effective price per standard size, usually per ounce: the collected price divided by the size.

BLS gives its own example. A half-gallon (64 ounces) of vanilla ice cream priced at $5.99 works out at 9.36 cents an ounce. If the carton shrinks to 60 ounces at the same $5.99, the price becomes 9.98 cents an ounce, a 6.7 percent increase, and the CPI records that increase.

Size is the easy case, because ounces can be measured. How BLS adjusts for changes in product quality, a harder and more contested problem, is covered in our guide to the consumer price index.

How much shrinkflation adds to inflation

To measure the effect, BLS built research indexes that strip out the price changes caused by size changes and compared them with the published CPI. Its first study, published in February 2023, covered 2015 to 2019 and found the effect on overall inflation to be small: the all items index rose 9.44 percent over the five years, against 9.39 percent with size changes removed, a difference of about 0.01 percentage point a year. Food and beverages showed the largest effect, 0.21 percentage point over the five years.

GAO repeated the exercise for December 2019 to December 2024, the period of the post-pandemic surge, and reached the same conclusion. Downsizing accounted for less than a tenth of a percentage point of the 34.5 percent rise in overall consumer prices, and 0.38 percentage point of the 32.4 percent rise in food prices. Within the most affected categories the effect was far larger:

The reason for the gap is weight. Downsized products are a small share of everything the CPI tracks, so they barely move the total. For a household that buys a lot of snacks and paper towels, the effect is closer to the category figures.

BLS now publishes these research indexes quarterly as the research CPI without product size changes (R-CPI-SC). The latest data run to June 2026. From December 2014 to June 2026:

Official figures are from the published BLS indexes, not seasonally adjusted; research figures are from the R-CPI-SC file, which BLS warns may carry larger measurement error than official indexes. Upsizing can push the other way: canned fruits and vegetables rose 49.6 percent without size changes, more than the official 48.0 percent.

When shrinkflation is most common

BLS also counts the size changes it finds in the CPI sample. The counts come with a caveat from BLS itself: the sample "is not scientifically designed specifically to measure upsizing and downsizing frequencies in the marketplace." As a rough guide to the trend:

No October 2025 data exist because of the federal government shutdown. Downsizing reports more than doubled from 2021 to 2022, the year inflation peaked at 9.1 percent, and stayed near that level through 2024. GAO found the same timing for coffee: size changes had almost no effect on coffee's CPI until August 2022, then "notably increased" per-unit coffee prices through June 2023. BLS ties downsizing to rising input costs, the same pressure behind cost-push inflation, and the 2022 jump fits that pattern. The highest count in the series, though, came in 2015, a year of low inflation.

Retail scanner data show why the effect feels larger at the shelf than in the index. Analysing NielsenIQ data for 2021 to 2023, GAO found that fewer than 5 percent of items in each of seven categories were downsized, but they were often popular ones: 1.1 percent of cereal items, accounting for 8.6 percent of cereal sales. Among downsized products, the average rise in price per unit ranged from 11.6 percent for paper towels to 32.4 percent for coffee.

How to spot shrinkflation

BLS notes that downsizing is often hard to spot: manufacturers may pair a smaller size with a new package design, and that size changes may apply to one flavour or size of a brand and not others. The checks that catch it rely on information the law already requires or many stores already show.

• The net quantity on the label. Under the Fair Packaging and Labeling Act, packages must state the net quantity of contents accurately, such as net weight or count. A changed number on a familiar package is the clearest signal.
• The unit price on the shelf tag. According to the National Institute of Standards and Technology, cited by GAO, 16 states, the District of Columbia and two territories had unit pricing laws or regulations as of November 2024, and many retailers elsewhere show unit prices voluntarily. The price per ounce or per 100 count captures downsizing that the sticker price hides.
• Counts on paper goods. BLS's own example: few shoppers know how many sheets are on their usual roll of paper towels. Household paper products had more size changes than any other CPI category from 2015 to 2021.
• A redesigned package. GAO's report shows downsized products whose packaging barely changed and others whose design changed noticeably. In both cases the net quantity line records the cut.
• Empty space. Federal food and drug law restricts nonfunctional slack-fill, meaning empty space in a package that serves no purpose such as protecting the contents. GAO notes that slack-fill can come with downsizing when a company keeps the old package and puts less in it.

Downsizing itself is legal if the label is accurate: GAO found that the Fair Packaging and Labeling Act and the Federal Food, Drug and Cosmetic Act do not expressly prohibit it. Bills introduced in 2024, the Shrinkflation Prevention Act (S. 3819 and H.R. 7825), would have directed the Federal Trade Commission to treat downsizing as an unfair or deceptive practice; GAO still described them as proposed legislation in July 2025. Over longer periods, the inflation calculator shows how much the dollar's purchasing power has fallen, measured by a CPI that already prices downsized packages per ounce.