British shoppers are becoming more aware of “shrinkflation,” as food producers cut packet sizes while charging the same or more than they used to.

Two-thirds of consumers have noticed some products have shrunk and 83% are concerned the trend is growing, according to a study by Barclays. Chocolate, crisps, biscuits and snack bars are the most likely candidates for shrinkflation, the study found.

Food inflation is proving particularly sticky in the UK, leading to accusations that supermarkets and food producers are benefitting from higher prices. Grocers have pushed back, saying they pass on lower prices to consumers as soon as possible.

Consumers have been switching to discount grocers Aldi and Lidl and buying store brands to save money.

About a fifth of shoppers are turning away from products that have been shrunk in favor of buying in bulk for better value for money, according to Barclays.

Read more: Why Is My Ice Cream Shrinking? Inflation by Stealth: QuickTake