Fret Scale Ruler – StewMac

Fret Scale Ruler

Determine fret spacings and layout fretboards accurately.
“Before working on any vintage guitar, I always check fret accuracy with these rulers.”—Dan Erlewine

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

#0800 Gibson Guitar Rule

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

This ruler 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 our article on scale length.

#0801 Fender / PRS / Classical Ruler

• 25.5″ Fender
• 25″ PRS / Dobro® / National™ / Benedetto
• 650mm classical
• 660mm classical

#0802 Martin / Mandolin / Banjo ruler

• 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″.

Dobro® is a registered trademark of Gibson Guitar Corporation

National™ is a registered trademark of National Reso-Phonic Company.

Paul Reed Smith® and PRS® are trademarks of Paul Reed Smith Guitars.