V MIA Viet Nam Veteran Missing In Action Military Vietnam Vet Hat Vest Lapel Pin Set Army Navy Air Force Marine Proud American Veteran Set of 3 pins by VCV. $4.99. The set above is our MIA-Vietnam veteran set. The pins are also sold separately. Check out our home page for the entire selection of pins. These are standard size hat pins. They are about the size of a penny. These are a great gift idea, or a stocking stuffer.