Axolotls typically grow to be about 6 to 12 inches (15 to 30 cm) long, with an average size around 9 inches (23 cm). While most adult axolotls fall within this range, some individuals can grow larger, up to 18 inches (45 cm), though this is rare
. Their weight usually ranges from about 2 to 8 ounces (50 to 250 grams)
. Size can vary depending on factors such as environment, diet, and genetics. Axolotls generally reach their full size between 18 to 27 months of age
. In captivity, a tank size of at least 10 gallons is recommended for a fully grown axolotl to accommodate their growth
. In summary, while the common adult axolotl is around 9 inches long, they can grow anywhere from 6 to 18 inches depending on conditions, with 12 inches being a good upper average for most pet axolotls.
