Author E.L. James has teamed up with three American clothing brands for an official range of merchandise, a major newspaper reported.
US store Briefly Stated will sell loungewear and undies, HYP will stock tights, stockings and garters, while Freeze Clothing will sell T-shirts and hoodies.
"Fifty Shades Of Grey" has sold 5.3 million copies since its release, and the complete trilogy of books has sold 12 million copies.
British store Ann Summers has said its overall sales are up 78 percent.
There has been a whopping 300 percent rise in the sale of eye masks since April 2011, says lingerie brand Boux Avenue, while coloured lingerie is outselling blacks and whites by three to one.
For lovehoney.com, which sells sex toys and lingerie online, July was the busiest month.
Sex toys used by Anastasia Steele and Christian Grey, character in the book, are now in high demand, the daily said.