Proper nut slot height

Actually the best way to think of the nut slot depth is in relationship to the string action height at the first fret and 12th fret Most

So then the nut becomes the lowest angle But each fret along that line only needs to clear the fret above it So if all the frets are the same

nut slot depth 3 to 4 I don't know in inches sorry And as for string height at the nut, I usually hold down the string at the3rd

nut slot height The digital nut slotting gauge allow for accurate measurement of string height at the first fret that can then be used to adjust the slot height An easy