my iguana is 6 months old and it is only 13 inches from head to tail is this a wright size?

Answer 1

No, she is a dwarf iguana

Answer 2

That does seem a bit small--does that size include her tail? If she's not growing properly, you must check your setup. They must have large enclosures, a basking temp of 100F, a powerful UVB reptile light, a fresh salad every day, and a pool large enough to soak in. See this website for more detailed care info:

http://www.anapsid.org/iguana/index.html