This test print allows you to measure how accurate your printer is in terms of printing thin walls. All the walls are 8mm tall and 15mm long, the varying values are the width of the walls. Here are the widths from smallest to largest: 0.05, 0.1, 0.15, 0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60 mm. Let me know if you have any questions. Do not forget to upload a picture if you end up printing the test! Happy Printing!