Use this tool to determine your ideal keyboard size based on finger spacing and black key width.

You’ll get a personal code (e.g. “3F”) that defines your perfect ergonomic layout.
Once you send us your code, we’ll follow up with a second package: a printed mockup of your specific keyboard size — so you can try it out at home.
 
💡 Prefer to save costs? You can also download and print everything yourself using our free files. 
 
Here the tool as a .step file and here as a .stl file. 
 
This listing is for those who prefer to have the tools professionally printed and shipped.