Subway employees will have to use a ruler to prove the chain is serving foot long sandwiches after a lawsuit found they were only 11 inches.
The world's largest fast food chain came under fire two years ago when a photo showing one of its sandwiches next to a tape measure went viral, which revealed it was just 11 inches.
This led to a class-action lawsuit from Subway consumers who said they were cheated out of an inch of their sandwiches.
Subway will now ensure their restaurants are adhering to the new rules and selling the correct length sandwiches.
Two years ago, Australian Matt Corby posted this picture of a Subway sandwich on Facebook with a ruler on top showing the sandwich barely stretched 11 inches. The photo went viral and led to a class-action lawsuit
The furore started in 2013 when Australian Matt Corby, uploaded a picture of a Subway sandwich to Facebook with a ruler on top showing the sandwich at 11 inches.
Separate lawsuits were then filed by plaintiffs in Chicago and on the East Coast, each seeking damages over a missing inch or more.
A lawsuit in Chicago was brought by Nguyen Buren, who claimed his Subway was less than 11 inches long and alleged a 'pattern of fraudulent, deceptive and otherwise improper advertising, sales and marketing practices'.
Attorney Tom Zimmerman, who is representing Mr Buren against Subway parent Doctor's Associations Inc, was quoted in the Chicago Tribune as saying: 'This is no different than if you bought a dozen eggs and they gave you 11 or you bought a dozen doughnuts and they gave you 11. It's no different, and yet you're paying for 12.'
At the same time, two men filed a similar suit in New Jersey state court, seeking damages in excess of $5 million.
Mr Zimmerman said he hopes their suit will be withdrawn and moved to federal court so they can be combined.
Subway employees (stock image) will have to use a ruler to prove they are serving foot long sandwiches
Subway consumers filed a lawsuit after they said they were cheated out of an inch of their sandwiches
As part of the new proposals, Subway will provide new training materials to make sure staff sell the full 12 inch sandwich.
Subway will also enforce stricter penalties to stores that fail to meet the new standards.
A hearing for final approval of the terms has been set for January 2016.
It had previously responded to the original complaint made in Australia.
A spokesman said: 'We have redoubled our efforts to ensure consistency and correct length in every sandwich we serve.
Our commitment remains steadfast to ensure that every Subway Footlong sandwich is 12 inches at each location worldwide.'