Octagon Shape. 10 gallon capacity. Acrylic construction. 13-1/4 in. x 12-1/2 in. x 29 in. H. You'll love the incredible beauty this acrylic aquarium generates by its design and size. Octagonal shape offers unique full-circle viewing that's accented with a black top and base. The unit is self-contained with filtration pumps and light system for easy setup.