I built this one for a customer. We fit it into the dimensions he gave us but he forgot to mention the overflow. So it will not fit.
The dimensions are 16" long by 13" deep and 12" tall. This would fit perfect on one half of a 40 breeder or a small cube tank. Cost is $325 shipped and is available now. Our custom projects are back ordered about two and a half months, maybe three months right now. We only do one or two pieces a week. So if you want a pillar without the wait this is the one to get. I have a second pillar in the kiln to fire on sunday that is also available if it survives the fire. But this one is nicer IMO.