@HollowOfWisps Blue roan is such a pretty color! One of my faves!
They say that foals get their height from their dam, so he's going to be big. But, depending on his Friesian lines, that could also influence how tall he gets. I've known several 17+h Friesians!
Given his age and his height now, I wouldn't be surprised if he makes it to 17 hands (or more). Friesians mature slowly, so he's not even close to done growing.
There's a Friesian/Percheron that shows local to me, and he is massive! Absolutely gorgeous too.
I think you will have a ton of fun with him!