Kim Kardashian West is auctioning off her old clothes for charity.

The 'Keeping Up With The Kardashians' star - who recently welcomed her third child, daughter Chicago, via a surrogate - is selling off some of her own outfits to raise money for the Children's Hospital Los Angeles.

Kim, 37, has listed 200 items on eBay, through marketing agency Auction Cause, including nude bodysuits, swimwear and a promotional T-Shirt for her husband Kanye West's 2013 album 'Yeezus'.

Some of the items up for sale - such as a fluffy, pink, Tom Ford turtleneck sweater - have previously been worn by Kim, while others, including a pair of bikini bottoms and La Perla lingerie, have never been used.

Kim has also included a pair of designer Buscemi baby booties.

Fans can also bid for white, studded Alexander McQueen boots, a black fitted Jean Paul Gaultier top, ripped Levis denim shorts and a brown velvet tracksuit.

Each item has a starting price of just $0.99 and 10 per cent of proceeds from the sale, which ends on Sunday (18.02.18), will be donated to the children's hospital.

Meanwhile, Kim is celebrating after shedding the weight she gained during her pregnancies with four-year-old daughter North and two-year-old son Saint.

She began the Atkins diet after Saint's birth in December 2015 and has been committed to a strict workout regime.

Kim - who wears training corsets to help reduce her waist - revealed on her app recently that her waist measurement is now down to 24 inches.

She revealed proudly: ''It's never been 24 ever in my life.''

Kim welcomed her youngest child Chicago into the world via a surrogate last month. However, the reality star has been keen to get straight back to work and doesn't want to take time off despite everyone telling her to ''slow down''.

A source said recently: ''Kim is determined to show the public she can have it all - she can be a mum of three, do sexy shoots, work all the time and still work out. She's doing all of these photoshoots so she can look like a super-mom. Beyoncé hardly took time off work after having the twins and was looking sexier than ever in shoots right away, and Kim wants to do the same. Everyone's telling her to slow down, especially as Kanye is away in Berlin, and she has nothing to prove. After all, every new mum takes time off. But Kim's determined to do it all.''