Fret Scale Rule

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Fret Scale Rule Gibson guitar rule

Gibson guitar rule

Item # 0800
In stock, ready to ship!


Fret Scale Rule Fender / PRS / classical rule

Fender / PRS / classical rule

Item # 0801
In stock, ready to ship!


Fret Scale Rule Martin / mandolin / banjo rule

Martin / mandolin / banjo rule

Item # 0802
In stock, ready to ship!


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Fret Scale Rule

Determine fret spacings and layout fretboards accurately.

"Before working on any vintage guitar, I always check fret accuracy with these rules."
—Dan Erlewine

Our accurate, high quality 22" x 1-1/4" x .030" rules, crafted of durable stainless steel for years of service in professional repair shops. Each rule has four different fret scales, and features precisely etched, easy-to-read markings on both sides.

#0800 Gibson guitar rule
This rule includes Gibson's long scale and three shorter Gibson scales. The three shorter scales are different lengths, but over the years Gibson has referred to all of them as 24-3/4". For more detailed information, see

  • 24.562" Gibson (24-9/16")
  • 24.625" Gibson (24-5/8")
  • 24.750" Gibson (24-3/4")
  • 25.300" Gibson long

#0801 Fender / PRS / classical rule
  • 25.5" Fender
  • 25" PRS / Dobro® / National™ / Benedetto
  • 650mm classical
  • 660mm classical

#0802 Martin / mandolin / banjo rule
  • 24.900" Martin short
  • 25.340" Martin long*
  • 13-7/8" mandolin
  • 26-3/16" banjo
*Martin long scale: The scale used on Martin Dreadnoughts is commonly referred to as 25.4" but is actually 25.34".

Product Instructions

Fret Scale Rule Instructions

Tips for using our fret scale rules for building and repairing guitars, mandolins, and banjos.

Customer Reviews

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  • 4.71 average rating from 14 reviews
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Money Well Spent

(Customer's Reviews)

Very convenient to have this to hand when marking for frets. A+++



(Customer's Reviews)

very well made and clear markings. I live in the UK and Stewmac is the only place I can get a classical guitar fret scale rule so I am really please it is a top notch product at a fair price


Great time saver

(Customer's Reviews)

Well made and a great time saver. A+

Showing 3 of 14 Read more reviews >>

StewMac PDF Catalog, page 14 See Fret Scale Rule
on page 14 of our StewMac Catalog PDF

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