That’s about the size of it

that's about the size of it

That's the reality of the situation; that's an accurate summary. A: "So, you'll need to start looking for a new house then, huh?" B: "Yep, that's about the size of it." That's about the size of it—we only have the budget to keep one of you on the team.
See also: of, size

That’s about the size of it

sent. That is the way things are.; That’s all there is to tell. Well, that’s about the size of it. See you tomorrow.
See also: of, size