Shrinkflation: how to spot it
The price on the shelf did not move. The thing behind it got smaller.
When a manufacturer's costs rise, they have two options. Raise the price, or reduce what you get for it. The first is visible on the shelf edge, where shoppers are watching. The second happens inside the packaging, where they are not.
This is shrinkflation, and it is chosen because it works: we track prices reasonably well and pack sizes barely at all.
Why it goes unnoticed
You remember what your regular items cost, roughly. You almost certainly do not remember how many grams were in the packet, because the number was never something you needed. The pack is a familiar shape in a familiar place at a familiar price, and all three of those signals stay intact.
A price rise breaks a signal you monitor. A size reduction breaks one you do not. Given a choice between the two, the second is simply less costly to make.
The three signs
1. The pack looks the same but weighs less
Redesigns often accompany a size change, precisely because a new look explains away a different feel. A thicker base, a deeper dimple in a bottle, a wider but shallower tub, more air in a bag of crisps. The footprint on the shelf stays constant so the product still looks right next to its neighbours.
2. The unit price moved while the shelf price did not
This is the reliable one. The selling price can stay identical through a size reduction, but the unit price cannot — less product at the same price is a higher cost per gram, and the label has to say so. It is the only part of the ticket that cannot hide it.
3. The recipe changed at the same time
Sometimes the quantity holds and the contents shift instead: a cheaper oil, less of the expensive ingredient, a different proportion of filler. Sometimes called skimpflation. The ingredients list is where this shows up, and the giveaway is an ingredient moving down the order, since ingredients are listed by weight.
Is it allowed?
Yes. Selling a smaller pack is perfectly legal as long as the quantity is accurately stated, which it is — it is printed on the front. There is no obligation to announce that it changed, and no requirement to draw attention to the fact. The information is disclosed and simply not advertised.
This is worth being clear about, because shrinkflation is often described as a con. It is not fraud. It is an accurate label placed where accurate labels go, exploiting the fact that almost nobody reads them.
What actually helps
- Compare on unit price, always. It is immune to the whole tactic.
- Learn the pack size of your five most-bought items. Only five. Those are where a change costs you repeatedly.
- Treat a redesign as a prompt to check. Not proof of anything, but a good moment to glance at the weight.
- Watch the own-brand equivalent. Shrinkflation does not hit every brand at once, and a size change often opens a gap that was not there before.