► 成句背比べ  [(3)せいくらべ]  [
どんぐりの背比べ]    
meaning:  similar  rank: 4☆ 
大統領候補は
皆ドングリの背比べだ ⇨ The presidential candidates are like acorns comparing their sizes. Nobody stands out, everybody is equally unimpressive
► 名詞背比べ  [(3)せいくらべ]  [coll]    
meaning:  measure  rank: 4☆ 
子供達が背比べをしている ⇨ The kids are comparing their heights