A proverb meaning anyone can look good with the right clothes; appearance can be improved by proper dress.
普段はラフな彼が今日スーツを着ていると、本当に馬子にも衣装だ。
He usually dresses casually, but in a suit today he really does look good — clothes make the man.
安い服でも着こなし次第で馬子にも衣装に見える。
Even cheap clothes can look good if worn well.