About this 3D model

When designing in CAD I quickly become lost in all the different dimensions. When the design is printed often I'm surprised at the size of the object. Often too small :(... But with this gauge block, it is possible to know the real-life size without having to confer with a caliper. The tool can as an example be excellent for determining the thickness of a box. The numbers on the faces of the block are the lengths and the number by the side is the thickness. The measurements are based on the common sizes I use. The heart-shaped wingnuts are intended to check for tolerances and fit for that printer. My experience is that all but the 0.1 mm will be loose, and can easily turn.