"Unit" shapes dimension units

To start off, when I say “unit” I mean unit shapes of 1 for its dimensions (e.g. unit circle).
Unit without quotes means measurement units (e.g. meter, centimeter).

When you make a basic cube or BSP box it has scale (1, 1, 1), is it correct to assume this (1, 1, 1) of the project “Distance/Length” unit? So if it is set as meter, it is making a “unit” cube of 1m x 1m x 1m, and what size I want is just a multiple of that?

When you make a BSP box, it also has “Brush Settings (X, Y, Z)” but it defaults to 200. 200 world units? So (1, 1, 1) a “unit” cube or (200, 200, 200) a “unit” cube (200 world units is 1m)?

I tried changing permutations of the properties listed above and all of them seem to produce incorrect results, especially with the FPS blueprint. Having 6 as the X scale doesn’t seem to product a 6 meter long polygon. I want to set these without blueprints.

The Box brush settings is the actual size of the BSP. So if you change your settings to use Meters it will be 200m x 200m x 200m at a SCALE of 1, 1, 1,.

Under the BSP Transform you will see
Location X,Y,Z
Rotation X,Y,Z
Scale X,Y,Z – The scale is the multiple of the Brush Size. So 1,1,1 @ 200,200,200 is in fact 200,200,200. However 2,2,2 @ 200,200,200 is in fact 400,400,400. Hope this makes since!