How Big Do Ball Pythons Get (And How Long Does it Take for Them to Grow)?

Ball pythons are one of the most popular pet snakes in the world, and their moderate adult size is one of the main reasons why. They are big enough to be impressive and enjoyable to handle, but not so big that they require room sized enclosures or two person handling. Here is what to expect as your ball python grows.

Average Adult Size

Adult ball pythons typically reach 3 to 5 feet in length. Females tend to be larger than males, with most adult females reaching 3.5 to 5 feet and most adult males staying between 2.5 and 3.5 feet. In rare cases, large females may reach 5.5 to 6 feet, but this is uncommon.

In terms of weight, adult female ball pythons usually weigh between 1,200 and 2,000 grams (about 2.5 to 4.5 pounds), while males typically weigh 800 to 1,500 grams (about 1.5 to 3.5 pounds). Ball pythons have a stocky, muscular build compared to more slender species like corn snakes, so they feel heavier than their length might suggest.

Growth Timeline

Ball pythons hatch at about 10 to 17 inches long and weigh around 50 to 100 grams. They grow relatively quickly during their first couple of years, then growth slows considerably.

Year 1: Most ball pythons reach about 2 feet and 300 to 500 grams by the end of their first year. This is when growth is fastest.

Year 2: Expect your ball python to be around 2.5 to 3 feet and 500 to 1,000 grams. Males may be approaching their adult size at this point.

Year 3 to 5: Females continue growing during this period and may reach their full adult length of 3.5 to 5 feet. Males will have reached or be very close to their final size.

Like all snakes, ball pythons never truly stop growing, but growth after age 3 to 5 is extremely slow. You will not notice much difference in size from year to year once your snake reaches maturity.

Factors That Affect Size

Genetics is the biggest factor in determining how large your ball python will get. A snake from large parents has the potential to be larger than average, while one from smaller parents will likely stay on the smaller side. If possible, ask your breeder about the size of the parents.

Diet also plays a significant role. Ball pythons fed consistently with appropriately sized prey will reach their full genetic potential. Those that are underfed or that go through long fasting periods may end up smaller. On the other hand, overfeeding causes obesity, which is unhealthy and can shorten your snake’s lifespan.

Sex is the most reliable predictor of adult size. If you want a larger ball python, females are your best bet. If you prefer a smaller, more compact snake, a male is the way to go.

Enclosure Size

A standard 40 gallon breeder tank (36 by 18 inches) is suitable for most adult ball pythons. Some keepers house larger females in 4 foot long enclosures for extra space. Baby ball pythons should start in smaller enclosures (10 to 20 gallons) since too much space can make them feel insecure and stressed.

The ball python’s manageable size is one of its biggest selling points as a pet. Unlike Burmese or reticulated pythons that require custom built enclosures and room dedications, ball pythons can be comfortably housed on a standard bookshelf or dresser top. For more about ball python care, check out our guide to popular pet snake breeds.