喪章 (もしょう, moshou) Japanese meaning: mourning band | KotomoraAt the funeral, attendees wore mourning bands on their arms.
喪章を腕に巻くto wrap a mourning band around one's arm
The attendees had mourning bands wrapped around their arms.
Counted with
For thin, flat things — sheets, plates, boards, and unstructured garments like shirts.
Used when referring to the ribbon-like band as a strip.
Etymology
Compound of 喪 (mo, 'mourning') and 章 (shō, 'badge' or 'emblem').