You'd be forgiven for assuming that after the bikini bridge and thigh gap backlash, retailers must have realised the general public do not find these images appealing or helpful.
But, as it turns out, retailers are pretty dumb.
When one Twitter user asked Primark "is it really necessary that these new mannequins have protruding ribs?", the internet replied to her question with a big fat 'no'.
Mel Fraser tweeted this photo of a mannequin with a visible ribcage in a Glasgow branch of Primark - the image has been retweeted over 2.8 thousand times, and counting.
The good news is thanks to the all-powerful folk of Twitter, Primark will be changing these mannequins, and pronto.
Primark isn't the first store to make such a questionable mannequin decision, which makes their poor judgement even more baffling to us.
Earlier this year, lingerie brand La Perla used mannequins with ribs showing in their stores. Like Primark, La Perla removed their displays after the internet showed their disapproval.
Here at HuffPost UK Lifestyle, we're not into 'skinny shaming' - yes, some women may have rib cages that naturally show - but as the majority of us don't (and can't naturally), retailers should not be making this something for young girls to aspire to.