2 3/4" X 1/2", and is marked HICKOK USA! I tried to find a flag that matched this, but could not, closes was a flag of HANOVER!
Rado Purple Horse Red Dial Two Tone Automatic Men's Vintage Wristwatch
Mens Rado Golden Horse Red Dial Date Automatic Watch Steel Silver
Vintage Bermuda Horse & Carriage Shield Silver Tone Cufflinks
Vintage Unmarked Horse or Mule Riders Gold-tone & Black Backing Cufflinks
Vintage Polo Horse Race Jockey Jumping Tie Clip Bar Equine Racing Silver Tone
Vintage Engraved Horse Black Enamel Tie Bar Clip Keeper Silvertone