付つけ紐ひも

noun

child's sash; attached cord

A cord or sash attached to a child's garment, traditionally used to keep the garment closed or to prevent the child from wandering too far. The term is somewhat dated and may be encountered in historical or traditional contexts.

• 昔むかしの子こ供ども服ふくには、付つけ紐ひもがよく使つかわれていた。

  In old children's clothing, attached sashes were often used.