Toddlers rib cage bigger on one side

[xamyrose]

Hi all, so I have a healthy 16 month old but for a few months I’ve noticed one of her ribs sticks out on her right side? It doesn’t seem to bother her. Is this a normal thing?

My twins both have strange rib cages that sort of dip in on one side, but DH has the same thing. They’ve had a great deal of medical examinations and no one has ever mentioned it.