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The Tokay Gecko is the second largest Gecko species, attaining lengths of about 11–20 inches (28–51 cm) for males, and 7–19 inches (18–48 cm) for females, with weights of only 150–400 grams (5.3–14.1 oz). They are distinctive in appearance, with a bluish or grayish body, sporting spots ranging from light yellow to bright red. The male is more brightly colored than the female. They have large eyes with a vertical slit pupil.