I made an Arduino nano case for my Arduino. I made this case to go over an Arduino nano to put in my iron man helmet. 

I bought this Arduino nano but I think this case will work for others as well.

https://www.amazon.com/gp/aw/d/B08C9ZVF51?ref=ppx_pop_mob_b_asin_title&th=1

Put the Arduino upside down in the case. Then click the arm into the hole. Finally, click the back in.

If you want to use the reset button just push the pegs down until it it makes the clicking sound.