African Dwarf Frogs get to be about 2-3" depending on their sex. I love the little guys but dont keep them anymore. Most places that sell them say that you can have one for every half gallon of water, NOT TRUE! if your wanting to get some then get several, but only do one for every 2 or 3 gallons or so. They like to be around others of their own kind but just like us, like to be able to get away from eachother too. Provide plenty of hiding paces and floating plants or platforms for them to hang out near the surface. they dont leave the water but like to hang out either below decor or right next to the waters surface.