The 2.5 gallon is 9 1/2" x 9 1/2" x 7" tall. The spount on the front sticks out another 1 1/4", and the screw top sticks out 1 1/2". When you get it, and you figure out how to put it together, you let me know ok? I've had mine for about 8 months, and I gave up trying to figure out how to hook up the tubing to the spout.
I bought it at J&L, and they couldn't even help me. I posted a thread on RC asking people how to put it together, and no one could help. So I gave up...