How big does the corn snake get?
The answer to that question depends on their age. A healthy adult corn snake will normally reach a length of anywhere from four to six feet, or about 48 to 72 inches, and a diameter of about one inch. They also weigh about two pounds. Their impressive size is first apparent immediately after hatching when they are about 8 to 12 inches long, or about a foot. This begins a period of very rapid growth. By the six month mark they should reach a length of about 20 to 30 inches or about 1.6 to 2.5 feet. By the time they reach about one year of age, they should reach anywhere from 35 to 40 inches or about three feet. It will reach full size after about two to three years and remain there for the rest of its life.
The corn snake is not the largest species in the United States. That honor goes to the forest-dwelling eastern indigo snake, which can easily reach a length of anywhere from seven to nine feet or 84 to 108 inches. It also doesn’t come close to the largest tropical snakes in the world. But the corn snake is nevertheless one of the larger, non-aggressive snakes that you can reasonably find in the pet trade. They grow at about the same rate (maybe even a little faster) in captivity as they grow in the wild.