Ah, the storied Delta Insignia with it's four beveled elements symbolizing the joint armed forces supporting the space mission: Air Force, Army,
Navy & Marine Corps. In the center of the delta is the star Polaris, which symbolizes how the core values guide the Space Force mission.
In this particular case however, it's simply a keychain dangling from your pinball machine's coin door, but in all other cases, see above statement.
Keychain measures 3-1/4" x 1-3/4".