Kim Kardashian Posts Throwback Picture of Her "Skinny Days"

Kim Kardashian still isn't satisfied with her post-baby body! On Tuesday, July 15—more than a year after giving birth to daughter North West in June 2013—the reality star

posted a photo on Instagram reminiscing about her "skinny days."

PHOTOS: Kim's post-baby bikini body

"Throwback to a few years ago #SkinnyDays,"Kanye West's wife captioned a picture of herself looking svelte in a tight white dress from 2010. "#OnTheTreadmillRightNOW," the 33-year-old added.

Back in October, during an interview with Jay Lenoon The Tonight Show, Mrs. West admitted she dropped 50 pounds after giving birth to her now 13-month-old daughter, thanks to a strict Atkins diet. Kardashian continued to drop pounds leading up to her lavish nuptials to West in May.

PHOTOS: Kim's post-baby style

The new mom got so much criticism for gaining weight while pregnant that in a recent interview withElle, she jokingly advised pregnant women to stay home and hide.

PHOTOS: See Kim's pregnant body

"I recommend hiding for a good year and having no pregnancy style," she said. "That's what I recommend. If you can do it, hide. Never leave the house."