He was awarded a medal for his many years of service.
The school badge is attached to the collar of the uniform.
He pinned the badge to the chest of his 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.