User blog comment:AnitaTotallyRocks/Do 6th Graders Get Shorter Every Year!?/@comment-4598697-20151012151630

I agree with Captain Frosty. They look smaller because you're growing.

I remember on Hey Arnold, the 6th graders looked like high schoolers. Heck, even some of the 5th graders did! (I think their school had a lot of held-back kids.)