Barron looks like he’s grown several inches AND has filled out.
Tell your grandson that height will come.
My hubby’s cousin was the same as your grandson, in middle school and first two years of HS. He had to sit on phone books to drive!
When he graduated from college, he was as tall, or taller than, all of the other boys in the family.
I do tell him some boys dont grow until a later age. His dad is pretty tall so I’ll be surprised if he isn’t a little on the tall side.