도토리 키 재기다 · 도토리 키 재기 같다
much of a muchness; all equally mediocre, so comparing is pointless
Example
두 후보의 실력은 도토리 키 재기라서 누가 이길지 몰라요.
The two candidates are equally mediocre, so there's no telling who'll win.
Word parts
Acorns measuring their heights: they're all tiny, so the contest is pointless.
Related words