Shelby Buster of Eugene, Oregon, was
"I walked in and the lady at the front counter said hey you're too big to be in this store, I need you to leave," Buster told KEZI.
Buster's mother confronted the employee, who then apologized, according to the news report.
The teen says the alleged incident hurt her self esteem.
"Seriously that's disrespectful and rude. Just because I'm bigger than you guys are, I'm not a 14 or smaller. It makes no sense why they would do that," she said.
Rue 21 told KEZI that "the company does not tolerate discrimination."
Rue 21 is a teen store with nearly 1,000 locations around the U.S.
Here's the video report: