Building a compact drop-shadow box for jewelry photos

Hi, all-

I am still trying to get things together so I can peddle my wares on
the internet. One of the tasks on my “to-do” list is building a
drop-shadow box for photographing my finished work. Unfortunately,
the standard specs for these boxes call for a box 3feet deep by
three feet wide, with a six-foot boom for the main light, and I
really don’t have room in my house to set something like this up. Is
it practical to build a scaled-down drop-shadow box? I would not be
photographing anything larger than four inches square.

Thanks in advance for your feedback!
Lee Einer