Where to change hair? (The Witcher 3: Wild Hunt)

In Oxenfurg, in one of the buildings on the map there will be a scissors icon, and a sign near the entrance

Emperor of PC games
In Novigrad, similarly to Oxenfurg, in one of the alleys

And also on Pontar there is. True, the guards through the gate on the bridge do not let. Fortunately, there is an option: jump off the bridge in front of them into the water and swim to the shore)

Maklline66
TIGERblacK
Vampires33
Thank you.

in Novigrad in the eastern part of the city.
in oxenfurt in the southwestern, sort of.
either look for the scissors icon, or look for the red sign.
because the icon sometimes slows down and is not shown (they are sleeping there).