Summary

This frame is 160mm. 720 coreless dc motors with diy ESC (mosfet)

UPDATE:
Today 29 July 2024, I update the frame since two of them are different length.

I also provide SKP file (Google SketchUp) if you want to develop it for your own use.
I use ice cream stick in my video and include the dimension (in the description about how to make our own mini drone frame for multiwii 2.3