Use Customizer to configure this design ^
Customizable version of design loved by many people - "Bed Leveling Calibration Test Object (Parametric)" by pgreenland.
This allows you to change dimensions to match your printer bed and also another parameters like squares size, outline size, etc.
This isn't all! You can also choose grid from the presets (full 5x5 grid, 3x3 grid, corners only) or make your own design using 5x5 grid!
I'm welcome for any tips, and I will try to address any issues or requests.
You can see (0,0) in bottom left corner