Filament Brick 20×20 – Calibration Cube w/ a Twist

🧱 Filament Brick 20×20 – Calibration Block with a Twist

The Filament Brick 20×20 is a smarter take on the classic calibration cube. Designed to do more than just confirm dimensions, this brick lets you test accuracy, stringing, and functional fit — and then keep it as part of a usable set.

🔧 Features

• Compact size (20 × 20 × 20 mm) — quick, easy test print.
• Studs & recesses – 5 mm × 3 mm studs fit into 5.2 mm × 3.5 mm recesses for a 0.2 mm friction fit test.
• Functional calibration – if the bricks don’t snap together easily but firmly, that’s not a failure — it’s a data point. It means you may need to adjust slicer scaling, tune extrusion, or dry your filament. Once dialed in, the snap-fit gives you confidence your material is ready for real functional parts.
• All-around testing – check dimensional accuracy, stringing, and tolerance in one print.
• Filament labeling - Abbreviated text on all four sides:
  • Front = Brand (dropdown or custom)
  • Left = Material (PLA, ABS, PETG, etc.)
  • Back = Filament type (Pro, Matte, Silk, etc.)
  • Right = Customizable (project name, temp, or anything you want)
• Stackable & playable – no more wasted calibration cubes; build a filament library that doubles as toys.

👉 Need more space for longer names and clearer text? Check out the Filament Brick 40×20