@kimkardashian / Instagram 1 / 6
@kimkardashian / Instagram 1 / 6

What a waist!

Kim Kardashian has one of the most famous bodies in the world, and her body is getting a little smaller thanks to a one of her trusty corsets.

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As she is prone to do, Mrs. West shared a photo of her small waistline on Instagram on Wednesday.

"I'm really obsessed with waist training! Thank you @premadonna87 for my new waist shapers! #whatsawaist," she captioned the photo of herself in black workout gear with the blue waist shaper corset around her midsection.

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Kim has previously promoted the corset from What's a Waist, posting an Instagram photo of herself in August while also wearing the product. She and sister Khloe Kardashian are listed on the company's website as users of the product.

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What's a Waist basically relies on muscle memory. Creators of the product claim that wearing the corset for extended periods of time will permanently change your shape. Kim is certainly buying into that claim.