How big do neon tetras get?

Neon tetras get to an average size of 1.5 inches (3.8 cm) in length. They can grow to a maximum of 2.4 inches (6 cm) in length, but usually don’t get bigger than 1.6 inches (4 cm).

Monitor the sizes of your neon tetras as they grow bigger, and remember not to overcrowd your tank.