The copperhead has a broad, unmarked, copper-colored head and a reddish-tan colored body with hourglass-shaped darker marks on its back. Its underside is a pinkish color. Its pupils are elliptical. Adult copperheads can reach about three feet in length. The average length of an adult copperhead is between 61 and 90 centimeters (24 and 36 inches). Young copperheads are typically centimeters ( inches) long. Copperheads are sexually dimorphic in size; females grow to greater lengths than males, but males have longer tails than females.
Copperhead snakes are medium sized snakes, with adults normally reaching 80 centimetres – metres (2 – 4 feet), with thick, heavy bodies. Their body is more slender, however, compared to most other pit vipers. There are five clearly defined subspecies. All subspecies have distinctive light and dark brown or greenish banding. Copperhead snakes are some of the more commonly seen North American snakes. They're also the most likely to bite, although their venom is relatively mild, and their bites are .
The average length of an adult copperhead snake is to 3 feet. Males grow larger than females, but rarely exceed feet in length. A copperhead’s .