Both male & female iguanas can get extremely large.
They can grow very rapidly, usually gaining about a foot per year for the first 4 years, to about 5ft long. Then they reach about 6ft throughout the rest of their life.
Record iguanas have reached a little over 8ft long, although this is extremely rare.
But still, at 6ft long, being such a large reptile, they require huge enclosures as adults.
