This is a slim case for the Lolin ESP32 S3 Mini

Board is roughly 25.5mm wide and 34.5mm deep. It fits nice and snug.
Note: these are smaller than the D1 mini boards

It has a hole for the LED and for the reset button. The program button is covered.
It clips together with a bit of force. Its a bit tough to reopen once clipped together.

Two versions. One has a extra large deep recess for USB (That is the one I printed in the photos) I recommend the standard version.

I printed this with PETG on my MK3 at 0.20 (quality) with a fill of 20%. I'm sure PLA would work fine too.

Give me a shout if you successfully print it.