shoulder boards
Long, flat objects worn on the shoulders of military or police uniforms to indicate rank or show some other form of insignia. Also known as a shoulder mark or rank slide.
Unlike epaulettes, shoulder boards are smaller and have no fringe trim.
If there's no rank indications, it may be plain epaulettes instead.

Pixiv
Twitter
Bluesky
Weibo
Lofter
Tumblr
