Here is my very small smartphone stand. Always with you. It's only 84x54x2MM
It's the Version V2.4
You can wear it in your wallet and assemble it in a few seconds to a stand.
There are also two holes to use it with a tripod.
Here is a video how it works on youtube:
https://youtu.be/Kw5hPtZZA_M
You can find an assemble video on youtube:
https://youtu.be/tuVGdW3C-PU
https://youtu.be/WRjGRb7x7aY