will my corn snake get any bigger

he's 3 ft now will he grow any bigger?

That is not true. They do NOT grow to the size of there tank. That is a wives tale and trying it will kill your snake. How old is the snake? It might get one more foot long but that is about it. Here is some good info: Corn snakes (Elaphe guttata guttata) are one of the most available snakes in the pet trade today. Vast numbers of corn snakes are captive bred annually, and are justifiably one of the most popular snakes of all time. Corn snakes are relatively small, rarely exceeding five feet in length, active feeders, tolerate a wide variety of environmental conditions, come in a dazzling arry of color morphs, and are very easy to breed. All of these factors combined make the corn snake an excellent choice for both the beginning and advanced reptile hobbyist.

Enclosure Size

Corn snakes are relatively small, and as such, they do not require large enclosures. A baby corn snake can happily live in a ten gallon aquarium or enclosure of similar size. Some people choose to keep baby corn snakes in plastic shoeboxes with holes punched in the side. This type of enclosure is acceptable as long as appropriate heating is provided. Upon reaching full adult size (about three to four years), a corn snake will require an enclosure with the minimum dimensions of a standard twenty gallon long aquarium. Larger aquariums such as a thirty gallon breeder or fifty-five gallon tank are also appropriate. No matter whether your corn snake lives in a humble home or a palace, there are several important details to keep in mind when setting up your new pet.