That’s an easy one 😉
Jacob in Brothers Lost is eighteen years old, only a few months from turning nineteen. In both Brothers Found and Brothers Adopted, he’s seventeen, putting him shorter than Sam and Dean both. So, give him a little time, and Sam and Dean will both be looking up to him! (And Dean will be complaining all the way)
He just needs a little more time to get to his full height.
February 4th excerpt:
As usual, Jacob’s prodigious size drew a few alarmed glances from the few patrons and waitstaff in the diner. He was used to this. He had been big for a while and he knew that it surprised people to see someone so big. He put on the least threatening demeanor he could manage when he smiled at the hostess, requesting a to-go menu.
He had to hold back a smirk as he found the cheeseburgers they had to offer on the menu she handed him. You people think I’m intimidating, he couldn’t help but think. It was with a self-deprecating kind of humor that he reminded himself of the nickname he’d earned from Dean.
Brothers Apart 