So I picked up a large chalice and due to the flow in the cube, it can't go in the front of the tank. So the only spot big enough and lower flow is where I have this huge mushroom. If you took a tape measure from one end to the other, I would guess it's about 10"-12". Due to it laying on the sides of the rock, it does not take up that much room but it's still about 6-8". I have no place for it in my 60g as it's just too big.
I would like this gone ASAP as I had to put it in my sump. I think $25 is a fair price. I would also entertain trades.