How much can nasal bones be narrowed by osteotomies?

Hello,
Usually, osteotomies are performed in the context of a hump reduction or a fracture correction.  With a hump reduction for example, the goal is to narrow the bony nasal vault and to allow the nose to appear more refined.  There are several types of osteotomies and the use of each varies between surgeon and desired result.  I recommend consulting with a board certified facial plastic surgeon to discuss your desires and expected outcomes.
Regards,

There is no one answer for the question how much are the nasal bones narrowed, it depends on the person and how wide the bones are.  Different techniques can be used to make a very subtle change or a dramatic change if the bone width is very wide.
I hope you find this information helpful.