The new apparel won't be cheap with Fashion Journal reporting that suits could set you back $3950 USD.
In an interview with the Wall Street Journal, the sisters said the pair will be focusing on tailored suits and similar separates.
Other pieces include knitwear, coats, jeans, footwear and accessories.
The collection has been two years in the making with, with their twins travelling the globe to make sure they found the finest fabrics.
"It’s important for us to do the research. We want to be able to offer the menswear market those same core foundation pieces at a luxury level,” says Mary-Kate in a recent press release.