I stumbled across the original version of this thing by accident the other day and thought it was one of the coolest simplest cases or cover for the Pi that I have seen in a while.

I remixed the original to get my Pi to fit, the original was too tight for me and I thought the side walls and cutout could have been a touch better. I made my own version for the Raspberry Pi Zero/Zero W and I made my own version for the Raspberry Pi 3B+ devices.

There should be enough room to allow for headers and jumper wires attached.

I print them standing up and no support is required.