Calibration Brick

thingiverse

To ensure your printer's accuracy, test it with this Lego-compatible brick. For a seamless fit with Lego bricks, use a print nozzle set to 0.4 millimeters. The printed brick should measure precisely 16 millimeters along its x-axis, 16 millimeters along the y-axis, and exactly 11.2 millimeters in total height along the z-axis. The bumps on top of the brick should be 1.6 millimeters high.