Tony - It's 16" X 16" X 16".
I went with super thick glass for two reasons.
Firstly asthetics, It looks amazing with the polished and beveled edges like a piece of crystal, plus with that thickness you don't need to run a bead of silicone on the inside so it looks super clean.
Second reason was for strength

It's in my office and I'd hate it if someone bumped it with something and it exploded everywhere
The stand is a 16 1/8" square of 3/4" MDF encircled in 1 1/2" L shaped 1/8" aluminum tucked underneath and inset into the MDF. The aluminum legs are from IKEA. Very structural/industrial looking stand and extremely strong.
Evan.