Credit: Instagram

Kailyn Lowry's little boy isn't so little anymore. Isaac Rivera is growing like a weed!

Check out how tall he's becoming in this pic.

"He's just soo big now. :/" Kailyn wrote.

Next thing you know, he'll be looking down at mom's head!

Wanna chat with fellow Teen Mom fans? Join the discussion on our Teen Mom Facebook page!
Follow @TeenMomWetpaint on Twitter

More About Teen Mom
Teen Mom News
Teen Mom 2 News
Teen Mom 3 News