Big Brick Compatible Base Plates – Modular Sizes

This project includes a set of compatible base plates for big building bricks, designed for stability, durability, and everyday play.
Perfect as a foundation for larger constructions, custom layouts, and modular building systems.

Included sizes

• 4×4
• 4×8
• 6×12
• 8×8
• 10×10

All sizes except 6×12 fit on a Bambu Lab A1 mini print bed.
The 6×12 plate requires a larger printer.

Key features

• Big brick compatible – precise spacing and stud geometry
• Strong & durable design – thick base and reinforced structure
• Reliable clutch power – bricks hold firmly without being too tight
• Modular system – combine different sizes freely
• Tested fit – manually tested with original big bricks for proper compatibility

These base plates work great with PLA.
Designed to be printed flat, with no supports required.

Use cases

• Base for large brick constructions
• Custom layouts and extensions
• Replacement or additional base plates
• DIY building systems and educational projects
• Roofs and elevated structures
• Additional floors for multi-level buildings

Multi-level buildings

After printing the stairs available in my other projects, you can combine them with these base plates to build fully multi-storey structures.
The consistent brick spacing and modular sizes make it easy to stack floors, connect levels, and expand buildings vertically.

Printing notes

• Recommended material: PLA
• No supports needed
• Print flat on the build plate
• Works well with standard layer heights (0.2 mm recommended)