Originally Posted by jikhead

After I stacked my rings and with the top off, I took measurements inside the box. It was a consistent 12.75" in the inner diameter all around, and the internal height is 3.75". 12.75 x 12.75 x 3.75 = 609.61 / 1728 = 0.353. Keep in mind that I'm using 3/4" MDF where as you used 5/8" correct? And my rings are probably a tad on the thick side. I could've gotten probably another .5" on the outer diameter of the rings. So if/when I do another one, I will try to get that little bit more out of the box size so I can squeeze out abit more cu. ft. I'm also gonna put carpet it on it too, so that will add to the overall size.