60 in x 13 in and 21 in tall (external dimensions)

This aquarium was purchased used. I have used it for my red eared slider turtle for about 2 years. The previous owner had 2 turtles in it, and had cut the center top bar out. PLEASE NOTE- this tank cannot be filled more than 3/4 full of water, otherwise the sides will bow outwards due to the lack of center brace on top.