I grew three inches between the ages of ten and thirteen, and an additional three between now and when I had last been here. I was half a foot shorter when I first met Grayson.

( he'd add on a line about how he had been significantly less nicer when talia had first left him in bruce's care, but bruce is smiling and damian is relatively certain he's teasing, so he'll - avoid spoiling that for him. for now. )