What is considered a normal width of the scar caused by forehead reduction surgery?

The general metric is 5mm of width is normal scar, anything more is considered wide. There are a number of techniques to minimize, and it is tension related. Big advancements mean bigger scars, especially if you don't anchor the underlying tissue. When wide, they are typically amenable to revision to make them thinner, and when you don't do further hairline advancement, that lack of tension should mean better scar. You can also consider transplants around the scar as well. Hope that helps.

Good Afternoon! The width of the scar should be relatively unnoticeable if good approximation of the tissues is performed. The length of the scar can vary from the temple hair across the forehead along the hairline to the opposite side. Much of it depends on the hair pattern present and degree of reduction necessary. If done well, the results, despite sounding like a large scar, can be quite nice. Hope that is useful!