We blinked and Rocky Thirteen Barker is already so grown up. 

Travis Barker for mom Kourtney Kardashian's 5-month-old baby boy looked so big in new photos shared for her 45th birthday. 

In one of the snaps, the Poosh founder lied in bed next to Rocky, and the little one's body stretched nearly down to her waist. In another shot, Travis held onto his son while sharing a kiss with the Kardashians star in front of a plane, and the tiny tot's sizable feet peeked out from beneath his striped blanket.