Mattress Giant Corporation was an American retailing company and mattress store chain founded in 1986 in Miami, Florida. The company was based in Addison, Texas. In 2012 it was announced Mattress Firm would acquire all Mattress Giant locations in the U.S in a $47 million deal, virtually all Mattress Giant locations will convert to Mattress Firm. Some stores are being converted to Sleepy's. The deal closed in July 2012 and it effectively ended Mattress Giant's presence as a bedding retailer. The website was operated through December 2012; and it delivered mattress related products to houses.Mattress Giant had a total of 360 stores in 14 states nationwide.