Keeping a unit cube handy

I suggest keeping a unit cube handy in your Hierarchy panel. When it's not needed, just disable it (uncheck the checkbox in the top left-hand side of the Inspector panel). It can be used like a measuring stick, or rather, a measuring block, when needed. I use one to estimate actual world sizes of objects, distances between objects, heights, and elevations, and so forth. Let's do it now.

Create a unit cube, name it Unit Cube, and place it somewhere out of the way for now, such as Position (-2, 0.5, -2).

Leave it enabled for the time being.