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Average adult size is 7-10 inches (17.7-25.4 cm), record is 19 inches (48.26 cm). Adults are small, thin, and may be rusty-brown or grayish, with a faint light mid-dorsal stripe and fleckings on the sides. There is a light band across the back of head. There is a dark spot on the upper lip scales under the eye. The belly is tannish to pinkish, with black dots along the edges. The scales are keeled, and there are 15 dorsal scale rows at midbody. The pupil is round.