I'm a Visual sort of guy, It helps me if I ~SEE~ rather than read or hear.
Upon buying my New PEC 6 inch scale, I had the typical choices, so I bought their Imperial/Metric scale.
It does 1/64", and inches decimal (100 per inch) then side two has Metric ( @ 0.5mm for 2 (or 4) CM, then the rest in 1.0mmm Plus CM's. The Fourth scale is (IIRC) 1/32 . I use this 6" scale for most of my work, as it is nitrided a "Gold" color and is plain easy on the eyes.
Using the Metric Side, even when DOING Imperial Work helps me "keep" them relatively "together" in my mind.
Note: the Company Incra Rules is my "Go To Ruler" for All Wood Working, and has been since 1989. their thin Stainless Steel is perforated so a .5mm Pencil will fit perfectly, the ends have a removable "Tee Square" that can slide so either top scale or bottom scale is "On Edge" with the Tee.
They Provide 1/16, 1/8, 1/4, etc. line markings & holes then, With a Unique system in the center of their Scales, (a series of Diagonal Holes Marked +/- ) one can Accurately Draw LINES to 1/64 inch Plus whatever inch distance from the scale.
They even have a 3X4 inch X/Y Plotter "scale". As Well as a Special Order for a Metric Based Scale Sized to the equivalent nearest Inch length say 75X100 instead of 3X4.
I do not work for, NOR Receive $$$ for "endorsing" their Products, I simply pass the information On as an Avid User.
As my STANDARD Pencil in my shop is a Metric .9 Milimeter lead, I once took the time to increase the holes in one scale to .9mm, But that is a Lot of work, you gotta be just a bit OCD to "do That" ! ! ! ! !
philip, Oregon is dry this week, Next week Fall will start!