I almost forgot to post pictures of Bella and Scout to show Kara how close they are in size. I think there's only a difference of 3 inches at the very most, and his rump is probably even with hers right now. I think he'll probably outgrow her, but he could surprise me. He's not even quite 14 months old yet, so I think he should have a good amount of growing left to do.
Not the most flattering pictures, but they show both of them together: