I created these models to add a setup in my office for Ethernet and HDMI connections. 

I did several versions (one bigger than the other) mainly because the HDMI cables and the adaptors need a lot of space (not so much for the Ethernet one. I only uploaded the 2 last versions.

The models do not have holes for the screws as I'm not an expert creator and was difficult for me to do it.

The holes in the box are for cable managment for my setup.

Measurements.

Big: wide:85 deep:95 Heigh:100

Mega: wide:85 deep:120 Heigh:100

For my setup I used the mega and there is no need for supports.