What is a USA Doober? It's the little Doober that you put on the size adjustment band on the back of your ball cap. Perfect for teams, organizations, or individuals to show their support. Show your Patriotic Spirit everyday with these Doobers. Let others know of your pride in your Country. These Doobers measure approximately 1 x 3 inches. Your satisfaction is guaranteed, period. Usually ships within 3 - 5 business days.