a simple compact case for Max4466 breakout board/microphone.  I'm using mine attached to a project box for a WLED Sound Reactive setup.   The enclosure has 2 small pins to line up the circuit board and hold it in place, on the bottom is a “key” for the lid to help keep the bottom end secured.   Underneath the lid, i made some space for the solder joints so the lid can sit flat on the case.    I was able to just snap mine in place and its installed facing upside down and the lid stays in place, but you could put a couple drops of glue on this once you've made sure the device is working as expected and you're ready to mount it.   I also included my test stl file, the one without mounting ears that you can just set wherever if attaching it to something else is not required.    Also, i made this case deep enough so you can use breadboard jumpers on the header pins to keep it simple.

My ESP32 WLED SR case if you want to mount this microphone inside the ESP32 enclosure:

https://www.printables.com/model/317718-esp32-wled-sound-reactive-box

Enjoy, please share any makes