You are right it is easy to over estimate. And I was giving numbers my dad gave me so I did doubt it for a moment and had to go check. The main trunk of the tree is actually 6 foot circumference and if you actually measured the very bottom it is bigger. The bottom 18 inches angles outwards at the end making it even bigger. This is a giant tree and it was planted after the house was build and I know the age of the house is only going on 24 years. Maybe I will get a video onto youtube if you guys really like.