He pinned the badge to the chest of his uniform.
He was awarded a medal for his many years of service.
制服の襟に学校の記章が付いている。
The school badge is attached to the collar of the uniform.
The winning team was awarded a medal.
Police officers wear their badge while on duty.
バッジ is a casual loanword for a pin or button badge, whereas 記章 sounds more formal and is used for official insignia or medals.
勲章 specifically denotes a state-awarded decoration for merit or achievement, while 記章 more broadly covers badges, pins, and insignia of any kind.
Used when referring to flat badge-like items; 個 is also possible in some contexts.
service medal; war medal
Standard modern spelling, especially for commemorative medals and badges.
Traditional kanji form; 徽 is not a jōyō kanji, so this spelling is less common in modern writing.
Compound of 記 (record, mark) and 章 (emblem, badge). The alternative form 徽章 uses 徽 (sign, emblem), which is not a jōyō kanji.