Unknown size, please see measurements in photos. This tank is ridiculously stretchy. This tank is authentic, very old, and very worn out and distressed. It is in fact clean and comes from a smoke and pet free environment. What you see is what you get with this tank. I tried to show all of the flaws. Has visible wear and tear. Sun bleached. Faded graphic: On the back it once said “Newcastle, PA” you can still almost see that. 🖤🧡🖤🧡🖤🧡🏴‍☠️🏴‍☠️🏍️