Should I be induced?

My due date is December 26th, and I want to ask my doctor to be induced for a few reasons: (I would be induced the 20th, or later.  So It would only be 6 days earlier. I would be about 39 weeks and 1ish day)
1. I was 10lbs when I was born and my brother and sister were both almost 10lbs, it runs on my fathers side of the family. And my baby's father was 9lbs so I'm guessing our baby is going to be big. And I was measuring ahead at a couple of my ultrasounds. 
2. I want him to be here before Christmas
What are you opinions?