Posting a picture to Instagram, the star posed in front of a bathroom mirror in the bikini, which is teamed with matching sunglasses.
Fans were stunned by Kim's snap, with many commenting how incredible she looked.
"Slay," one said.
"Queen," another commented.
"You look fantastic," a third added.
Her photo comes after the Keeping up with the Kardashians star revealed she lost 7 kilograms in two weeks to fit in her Met Gala gown, Marilyn Monroe's iconic 'Happy Birthday Mr President' dress.
The reality star admitted that she cried when she realised she didn’t fit into Monroe’s dazzling outfit during a first try-on but went on to lose weight so she could model the famous 1962 Jean Louis design on the New York red carpet.
“I had to lose 16lbs to fit into it,” she told Vogue. “I would wear a sauna suit twice a day, run on the treadmill, completely cut out all sugar and carbs and just eat the cleanest veggies and protein. I didn’t starve myself but I was so strict.”
Body advocates however denounced Kardashian's dieting and spoke out about the contribution to toxic ideas around body image and beauty standards.
"Many young girls will read this and try to do the same exact thing. Kardashian is an idol to many and there are so many people who would do anything she says in the hopes to look more like her," New York-based dietician Marissa Meshulam told Yahoo Life.
Claire Harris, who is recovering from anorexia, also said glamorising crash diets could be damaging.
“To lose that much weight in such a short space of time must mean that she starved herself – something which can cause lifelong problems. These celebrities influence people and I worry that her followers might copy her. Yet they have no idea of the damage they could be doing to their bodies.
“I had anorexia throughout my late teens and early twenties but once it’s in your head, it never really leaves. It’s a dangerous road to go down and better to never start. We need a lot more positive body image in the media instead of tiny actresses and influencers who are so thin. It’s simply not achievable for everyday people and it’s such an unhealthy image for people to look up to.”
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