Anita is tall for her age, and for being a girl, and still has a few more inches to go, in all likelihood. Her father was a big man. In her tenure on Young Justice she's encountered all kinds of people (including aliens) who are very tall in general.

The man she's encountered in this storeroom dwarfs most of them.

He doesn't seem to really know whether to acknowledge her or not beyond the eye contact they've already made, but Anita's willing to make the first step, straightening up to her full height. "Are they all as big as you, where you're from?"

Hopefully it isn't taken in the wrong way.