An expression meaning 'you could say' or 'it would be fair to say' — used to make a mild or qualified assertion.
彼はこの分野の第一人者と言ってもいい。
You could say he is the leading expert in this field.
このケーキは芸術品と言ってもいいほど美しい出来だ。
This cake is so beautifully made you could call it a work of art.
彼女の努力は模範的と言ってもいいだろう。
One could say her effort is exemplary.