This Test Cube is used to calibrate the Accuracy of the 3D Printer in all three Dimensions X-Y-Z. The Wall Thicknes is 1-2-3-4mm, the Hight goes from 10-9-8-7mm and the Outside Dimension of the Cube is 25x30mm. On some Slicer Software, like Cura or Simplify3d, you have to justify a Value called Flow rate or Extrusion multiplier