First, you should think about the scale. The length between the nut and the bridge is called the scale length. This is the entire length of the free-swinging strings. The 12 fret is always in the middle of the scale. The collar distance depends on the scale length. Standartsmensuren are 635mm or 650mm.
Here is a list of the most common scale lengths and their manufacturers
| Inches | Millimeter | Gitarre / Hersteller |
| 20.7 | 527 | Squier / Rickenbacker |
| 22.5 | 572 | Fender |
| 22.72 | 577 | Fender |
| 23.5 | 596,90 | Fender Jazzmaster/Jaguar |
| 23.5 | 596,90 | Gibson Byrdland |
| 24 | 609,60 | Fender Duo-Sonic/Mustang |
| 24-9/16 | 623,88 | Gibson-style guitar |
| 25 | 635,00 | PRS, National-style guitar |
| 25.6 | 610 | |
| 25-5/8 | 643,64 | Martin standard steel string guitar |
| 27.67 | 645,16 | Martin Dreadnought or OM steel string guitar |
| 25-5/8 | 647,7 | Fender-style-guitar, Gibson acoustic guitar |
| 25.59 | 650,00 | Typical classical guitar |
| 25-5/8 | 650,88 | Guild acoustic guitar |
| 26.38 | 670 | Banjos / Gypsy Jazz Gitarren |
| 26.5 | 673 | |
| 27 | 686 | Fender / Ibanez |
| 27.67 | 702,82 | Baritone guitar |
| 29.5 | 749 | |
| 30 | 762,00 | Short scale bass guitar |
| 32.5 | 825,50 | Medium scale (Rickenbacker-style) bass guitar |
| 34 | 863,60 | Long scale (Fender-style) bass guitar |
