Renfrewshire Council Trading Standards officers visited retailers throughout the area to ensure products matched their advertised weight.
Legal protections for consumers require sellers adhere to strict rules that minimise variation among packs and so prevent buyers getting less than they pay for.
Spot-checks carried out last month saw Renfrewshire Trading Standards officers discover short weight packs on shelves in national supermarkets and local shops alike.
The items included packs of cheese, chestnuts, tablet, toffee, sausages, satsumas and plums.
Councillor Eddie Devine, convener of Renfrewshire Council’s environment policy board, said: “Whenever people buy an item they are entitled to expect the weight printed on the packet is really what they are getting.
“Our Trading Standards officers protect both consumers and business from unscrupulous business practices.
“The rules actually allow a minimum variation to give packers essential flexibility, so it is simply unacceptable for these to be breached.”
Officers from Renfrewshire Trading Standards visit premises including manufacturers, retailers and importers.
They ensure weighing and measuring equipment is accurate and is properly used, that goods are safe and correctly labelled, that descriptions are accurate and prices are displayed.
For the past 10 years there has been a legal obligation on sellers to ensure pre-packaged goods sold in constant quantities meet three rules.
The first is that the average of the batch is at or above the declared weight. A small percentage below the stated weight is allowed, but no more than one in 40 items in any batch can be at a weight below this.
The law also requires that none of the items in any batch is out by more than twice this ‘tolerable negative error’ weight.