I have a 5 foot female boa constrictor and I have no idea why i am concerned about her girth. She seems pretty skinny compared to other boas I've seen of her size. I wrapped a piece of yarn around her and measured it to be about 5-6 inches. She eats 1 large rat every 3 weeks. I wanted to breed her some day. I dont know exactly how old she is. The guy I got her from had her for at least a year but I dont know how old she was when he got her. He got her from a reptile breeder at an expo and the container he got her in has been her water bowl ever since so I have it and its pretty big, so I have a feeling she wasnt a baby when he got her, but hey, what do I know ^_^ Lets talk, I'm new here I tried posting pictures but I dont think it uploaded..little exclamation points are popping up. So..