How much will he weigh?

And how long will he be? Help us test out Power Blogger's new, updated comments feature. They have fixed it so anyone can leave a comment - of course, good old anonymous always works, too! Anyway, Jonathan has his four month appointment coming up soon. Post a guess on his height and weight here! The one closest to the actual figure will get . . . heck, I don't know. Bragging rights? Pick a number and post a guess!