A full grown Beardie is less than a foot long.
I love it the bigger they are. They are a lot of fun when they get HUGE. More like a puppy. I had one once, it was kind of odd, he grew to 7 feet. No one believed me at the petstore so I brought him in and they measured him, 7 feet 2 inches. They said "What are you feeding him?" Hahahaha. "Whatever he wants." I told them. This was the one that loved cake. He didn't have it too often but if he knew there was CAKE in the house he just waited for me to get some then he'd come AMoochin.
The really big ones sleep with me. I have a big bed so they have their own side with little pillows I make them, their heating pads and wrapped up in flannel, baby blankets. I DO have a very, large tank if things get crazy, someone HAS to go if they don't settle down. Once they go to sleep for the night they don't move and usually will sleep 10 to 12 hours. Unless of course it's a male and he's horny. Hahahahaha. I had one, the same big one that liked cake, he'd crawl up on my chest, do push-ups and start sneezing up my nose to wake me up. I thought that was hysterical. I never got mad at him, he was just so cute and comical. I'd just get up and give him some food and water then go back to bed. He'd sit in the sunny window and watched cartoons til I got up.
Here is my little male watching Sesame Street. I often find him just standing there for hours. He is so intrigued:

Is that NOT the cutest thing you've ever seen??
Here they are in their morning tank in their water watching T.V. watching Curious George or Word Girl, I think. Or Barney, Hahahahahahahaaaa:

All Lizards just love picture books too, especially dinosaurs. I have a couple pop-up books, Freaks them Right Out. It's just too funny.