Earlier quoted context omitted.
This feels like a dumb question, but I can't find dimensions of the Notecard anywhere and I can't quite judge the scale from the pictures. How big is it?
https://github.com/blues/note-hardware/blob/master/Notecard/... has the measurements, looks like 35mm x 30mm
Here’s a pic of the note card plugged into their Raspberry Pi note carrier. That’s a standard 40 pin 0.1” spacing connector on the left, so it’s 2” plus the mounting holes in that dimension. 65x57mm and about 20mm tall for the stackable 40 pin socket+pins.