背せ幅はば

noun

breadth of the back; back width

Refers to the physical width of a person's back, often used in tailoring, clothing sizes, or body measurements.

• スーツを注ちゅう文もんするときは、背せ幅はばを正せい確かくに測はかってもらう。

  When ordering a suit, I have the back width measured accurately.