A new study by “RetailSails” (http://retailsails.com/) — a resource for fact-based insight and analysis covering the U.S. retail industry — says Apple is top US retailer based on retail sales per square foot.

The study says Apple has sales of $14,109 billion in 327 stores with an average size of 7,886 gross square feet. That’s 5,626 sales per square foot. The figures are based on global results for the most recently reported trailing four quarters (through fiscal quarter three that ended June 25. Apple is almost two times ahead of their closest competitor (Tiffany & Company).

“It’s not surprising Apple leads the pack, but it is quite shocking by how far ahead of the competition they are, especially considering the company only has 10 years of retail experience,” says “RetailSails.”

Other chains in the “RetailSales” list are: Tiffany & Company, Coach, Iululemon Athletics, GameStop, Costco Wholesale, Whole Foods Market, Best Buy, Zale Jewelers, Walgreens, Sam’s Club, Aeropostale, J. Crew, BJ’s Wholesale, Urban Outfitters and Guess?