I think its just a pretty standard older tank. 48"W x 18"D x 20"H i believe. No center brace which i was originally unsure about, but the glass is quite thick and filled to the rim im only seeing 1/8" bow out anyways which is hardly noticeable.
I just didnt know anything about keeping turtles and wasnt sure if tank generally used for this even got filled to the top. I will need to reseal is it seems as im getting a pinhole drip through the seam in one place, but other than it needing a good cleaning i think itll be fine. It was a good price with everything i got anyways