Lori Olsen Arnholy, from Wooster, Ohio, said on Facebook her family regularly eats at Subway and decided to measure their sandwiches to see for themselves.

 She said she bought six footlong subs Monday and four of them were just 11 inches long.

"I always thought I was always getting 12" subs ... I do smell a lawsuit," she said.

Some customers vowed to never eat at the restaurant again.

 "I will NEVER buy anything from Subway now. Ever," posted Marius Andre Stensaker.

Danielle Neal said, "I feel like you've straight-out lied to costumers. I don't care if it's just an inch, it's the moral of the matter that concerns me."

 Subway said in a statement Thursday the size of the bread can vary when it's not baked to the company's exact specifications.

 "We are reinforcing our policies and procedures in an effort to ensure our offerings are always consistent no matter which Subway restaurant you visit," the statement said.

Subway, the largest fast-food chain the world, has more than 38,000 restaurants in 100 countries.