expression
no more, no less; that's exactly it
Used to emphasize that something is exactly as stated, without exaggeration or understatement. Often follows a statement to assert its completeness or accuracy.
彼の説明はそれ以上でもそれ以下でもなかった。
His explanation was no more and no less than that.
この映画は傑作だ。それ以上でもそれ以下でもない。
This movie is a masterpiece. That's all there is to it.
そのまま means 'just as it is' or 'without change', focusing on the state, while それ以上でもそれ以下でもない focuses on the accuracy of a description or evaluation.
A fixed expression composed of それ (that), 以上 (more than), 以下 (less than), and the negative copula ではない. Literally 'it is not more than that nor less than that'.