The frame is made out of 3/4” PVC  and measures 20” x  20” x 20”. Glue the pieces in place EXCEPT the two “T” sections on the top cross sections. These “T” sections will have to be friction fit so they can be rotated. I am not giving exact dimensions because the size of the box can vary according to your needs. Build it to the the size of what you expect to be photographing.

The tower section is an option that can be used to hang the box up when not in use or to mount a spot light on. It is just a friction fit.

The “Handles” on the top rails are for hanging lights off of when up close side lighting is required.