With how big my frog had been growing so quickly, I was starting to suspect my frog was female. Then I heard that awkward duck honk in my room and had to look up what their croaking sounded like. So I'm guessing my frog is male and pretty close to fully grown at around three inches.
I had been planning on buying an 18x18 exo terra down the road if my frog got big enough, but now I really want one. They look nice and it looks like it would be easier for feeding and misting with the front doors instead of having to remove the lid and the lamp each time I need to get in there. The 12x12 seems kind of small, and not much more room than the 5 gallon he is currently in.
I know for sure it would be overkill. My frog moves maybe once a week to find a new spot like an inch away from his old spot. Would it be overly stressful? Nothing I've done seems to bother him at all, never buries himself fully and always eats even if I mess with the tank a lot. But he lives in a 5 gallon, so who knows in a bigger tank.