They are from the same clutch, are about 2.75" and weigh 90-100 grams. And are about 3 to 4 years old. I've had Geo for several months and was able to take in Leo just a couple days ago. Geo hasn't grown but maybe (maybe!) a millimeter at most. They share a 7 sq ft (28"x36") enclosure and eat clover, weeds, greens, hay&Mazuri, etc.