The extra weight will be included in brands such as Hula Hoops, Skips, NikNaks, Disco's and Wheat Crunchies.
The new handypacks including the 25% extra weight will feature an on-pack flash communicating the larger pack size to give greater visibility for the range on shelf. They will have a suggested retail price of £0.49.
UBUK Bagged snacks marketing director George Johnston said that price and value for money continue to play a crucial part in consumers' purchasing decisions and remains a key focus for the snacking category.
"With almost 16 billion snacking occasions and 650 million of those out of home snacking occasions, there is a massive opportunity for retailers to grow their sales by offering consumers greater value for money by stocking up on this new range of handypack snacks with 25% extra weight," Johnston added.