Nut width is the width of the neck as measured at the nut.
For Guitars we offer the following:
1-5/8″ (41.28mm) This nut width works best for those who have smaller hands or prefer tighter string spacing. Probably our most common nut width.
1.65″ (41.91mm) This size is popular with most vintage 50’s and 60’s Fender necks. If you are looking for an accurate nut width for vintage styles, this is the correct choice.
1-11/16 (42.86mm) This is the size used on most modern necks; it allows for a bit more space between strings.