Both male and female crested geckos reach a moderate size of 4 to 4.5 inches snout-to-vent length (SVL), and 8 inches in total length. Crested geckos are sexually mature when 15 to 18 months of age, and at a weight of approximately 35 grams.
Baby crested geckos are best housed in large plastic terrariums or in standard (20-inch) 10-gallon reptile tanks with a screen top. An adult crested gecko should be housed in a 20-gallon tank with screen top. Larger tanks will allow for better displays. In areas with moderate to high relative humidity, crested geckos will fare well in screen cages. These tanks have the advantage of being light and easy to clean. You can keep one male and several female crested geckos together. Male crested geckos may fight, particularly when in the company of females, and should not be kept together.