that’s about the size of it—(coll.) that sums up the situation; that’s how things are (also: that’s about it):
- “The house is exactly what we want, but it’s too expensive.” “Yes, I’m afraid that’s about the size of it.”
that’s about your size —(sarcastic) one would expect that of you:
- That’s about your size to send a threat through the mail, but I notice you haven’t the guts to sign it.