Size: The largest lizard is the Komodo monitor. It can grow longer than a person. The smallest lizard is a tiny gecko. Characteristics: Most lizards have dry, scaly skin. They have four legs, clawed feet, and a long tail. You can see their outside ear opening.Lizards have a weak tail.ize: The largest lizard is the Komodo monitor. It can grow longer than a person. The smallest lizard is a tiny gecko. Characteristics: Most lizards have dry, scaly skin. They have four legs, clawed feet, and a long tail. You can see their outside ear opening. Lizards have a weak tail.