I have been working for a while on a wooden sailing ship model, where at times one will reference model parts in terms of real dimensions - e.g., a 4" x 18" piece of wood. But that has to be translated into the model's scale when measuring the model parts.
To streamline this, I made a little Arduino-driven device with an OLED display that can plug into the digital output port that many digital micrometers have. It takes the current micrometer measurement, applies the scaling factor, and displays the scaled dimension on the OLED.
So that means I can take a small piece of wood from the kit, measure it with the micrometer, and directly see its full scale dimension - e.g., it's a scale 8" thick plank. Or I can take the micrometer to the 8 foot measure, and use it to mark off a piece of wood that I want to be that long.