Bread and breakfast cereals are the most likely to be affected by shrinkflation, whereby a product shrinks in size but its price doesn't.
The Office for National Statisitics (ONS) studied the price of 17,000 items between September 2015 and June 2017.
It found 206 products in all categories had shrunk in size, while 79 increased.
The Brexit vote sparked a fall in the pound and a rise in the price of imports. But the ONS said this did not lead to a pick-up in shrinkflation.