Not that I am anywhere close to getting there. I've only got two WTFs.

The pet store that I work at has two more lovely specimens of White's. We have had them in for at least three months and everything is looking good. They're eating well and actually really active. They're cuddly (or as cuddly as a tree frog can be)! I'm feeling kind of bad for them because I am thinking that they might not sell because of their size (they're about 2 - 3 inches, roughly). And, honestly, the only reason we got them in at that size was because I needed a bigger one to go with my male that I had. When I decided to purchase the male, we had had him in the store for about a year (and I have had him for about a year). I took pity on him and took him home because I had a 20H aquarium that just happened to be empty.

My question is...

How many can comfortably fit into a 24x18x18 Exo-Terra Terrarium?

It's kind of bare at the moment, but I'm planning on installing a false bottom and stocking it with live plants.