Heidi Montag Downsized Boobs From Mega-Huge to Huge

12/2/2013 3:00 PM PST

Heidi Montag -- I Downsized My Boobs ... From Mega-Huge to Huge [PHOTO]

So long crazy F-cups ... Heidi Montag has unveiled her new C-cups after undergoing yet another breast-related medical procedure in October ... this time to REDUCE her breast size.

You'll recall, Montag famously underwent 10 plastic surgery procedures in one day back in 2010 -- including a mini brow lift, liposuction, buttock augmentation, Botox, a nose job, fat injections in her cheeks, nasolabial folds and lips, chin reduction, and increasing her breast size to F-cups.

Montag has publicly stated she regrets the procedures, and claims she got her breasts reduced because the enormous jugs were taking a toll on her happiness.

Montag says she was young and "unstable" when she got the procedures ... and now warns other girls about making the same mistake.