How to make thousands of dollars selling your clothes, according to the top users of a popular app

Men and women across the United States are joining the Poshmark craze and selling their clothing online. Some are even turning it into a full-time job and launching their own boutiques.

This online-only marketplace functions in a similar way to eBay in that it allows people to buy and sell clothing and accessories with ease.

Since launching in 2011, it's transformed into a community of four million sellers, who so far have been paid out $1 billion, according to Poshmark. The company was founded by Manish Chandra, who is currently its CEO. His idea for Poshmark came about as iPhones started to explode in popularity and Chandra realized just how easy he could make the process of selling clothing online.

"It marries technology, fashion, and commerce together," Chandra told Business Insider.

Earlier this year, Business Insider interviewed top seller Suzanne Canon, who has personally pulled in $1 million in sales since she started selling in 2012. Selling on Poshmark is now her full-time job.

"I don't understand how it happened. I went on the app to make a little money on extra clothes," she told Business Insider.

Sellers only need to upload photos of their items from their phone to the app in order to list them for sale. Poshmark takes a $2.95 commission on all sales under $15. It takes a 20% commission on any sales above $15.

We spoke to five of the app's top sellers, who have pulled in amounts ranging from $10,000 to more than $100,000 since beginning to sell on Poshmark over the past few years.

See their top tips for turning a sale on Poshmark, below: