that's about the size of it
US /ðæts əˈbaʊt ðə saɪz əv ɪt/
UK /ðæts əˈbaʊt ðə saɪz əv ɪt/
1.
used to confirm that a statement or description is accurate
:
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So, you're saying we need to start over from scratch? Yes, that's about the size of it.
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He's always late and never finishes his work on time. That's about the size of it.