[Larry Pattis]

The general formula that most builders use results in the bridge spacing and overall 14th fret width (not 12th) being equal...and this is regardless of what the nut width is.

I tend to prefer a wider fingerboard taper, and this is generally making the overall 12th fret width of the 'board as equal to the bridge spacing.

I do know of a few builders who spec-out their standard guitar with 2-1/4” bridge, and match that at 12, the way I like it. This is great for a bit more distance from the e-strings to the edges of the fingerboard...which is what *I* prefer.

On some builds I have gone even wider, matching a 2-1/4” bridge with a 2-5/16” 12th fret width. That was really pretty extreme, but it was a great “feel”, playability-wise. No matter how much side-to-side vibrato I created, nor with any vigorous hammer-ons, could I pull the high e-string off the edge of the 'board.

Others (players & builders) prefer the *exact* opposite, and they like their E strings fairly close to the edges of the fingerboard...so their fingerboards taper *narrower* than what I have discussed above. With all of these observations, there is no "ideal", nor is there a *right* or *wrong* for *everyone*...YMMV.

Your guitar, from our PM exchange, is 2-5/16" at the bridge.

In my ideal-world this would be the measurement at the 12th fret...but *your* guitar is 2-1/4" at 12, and so I guarantee that at 14 it is 2-5/16" (again, with the 2-5/16" bridge spacing)...this is the way *most* guitars are built, that is, matching the bridge spacing with the overall 14th fret width.