She’s looking ~significantly~ smaller!

Kourtney Kardashian shared a throwback pic to celebrate her BFF’s birthday — BUT we couldn’t help but notice her less than ample chest size!

The Kardashians are known for being fans of plastic surgery, and the mother-of-three is NO exception!

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Kourt has never been shy about the fact that she previously went under the knife for a boob job though the reality star revealed, “I was never insecure about my breast or my body.”

Kourt post-boob job.

The Keeping Up With the Kardashians star had the breast augmentation in college and said, “I just got the idea in my head one day and that was that.”