12"w x 18"t there are 2 frogs a male and a female; he is smaller but she has not tried to eat him idk the humidity-I spray once a day with distilled water idk the temp we use distilled water for misting and soaking eco "something" came with the terrarium for substrate artificial greenery hanging, dried and rehydrated moss, log and stick perch are real main food is crickets just read about vitamins and calcium natural lighting we have not really been doing anything to maintain a constant temp, when it is cold we have a heating pad that is turned on under the terrarium there was poop in the terrarium when I cleaned it last night I included a pic in my original post of the terrarium and female I have no idea how old she is we have had her for about 3 weeks she was wild and caught so was he we have been doing crickets daily we do not handle them unless we need to move them to the smaller terrarium for cleaning and then it is just once, because they jump back into the larger on their own low traffic area