counter
counter for scraps, fragments, petals, etc.
Used for small, flat, or broken-off pieces. Common with things like paper scraps, flower petals, or torn cloth. Often appears with the reading いっぺん for one piece.
See also: 一片 (いっぺん)
紙が一枚と、その一片が床に落ちていた。
A sheet of paper and a scrap of it had fallen on the floor.
花びらが一片、風に舞っている。
A single petal is dancing in the wind.
The kanji 片 originally depicts a split piece of wood, giving rise to the meaning 'fragment' or 'one side'. The counter use is a natural extension.