Best Answer: Introduction: If cared for properly, iguanas can be a very rewarding pet. Due to there size (they can grow to be 5ft. long and 20lb.) and special care requirements they are not the pet for everybody. This is a guidline that I use when caring for my iguanas (Izy, Iggy, Houdini, Dagobah, Reptar, and Dino). Enclosure: