A cockade is a knot of ribbons, or other circular- or oval-shaped symbol of distinctive colours which is usually worn on a hat.

Cockades of the European military
The following is an incomplete list of traditional cockades used by various nations; the colours are listed from the inside out. If the air force roundel resembles a cockade but differs from the traditional cockade, the roundel is also specified.

Argentina - light blue-white-light blue
Austria - red-white-red

• (until 1918: black-gold)
  Belgium - black-yellow-red
  Bolivia - green-yellow-red
  Bulgaria - red-green-white
  
  
  
  • (Bulgarian Air Force roundel: white-green-red)
    Brazil - blue-yellow-green (used as a roundel by aircraft of the Brazilian Navy)
    Chile -
    
    
    
    • as worn on peaked cap: blue-white-red with a five-pointed silver star in the middle
      as worn on Pickelhaube: red-white-blue
      Colombia - yellow-blue-red
      Denmark - red-white-red
      
      
      
      • (Royal Danish Air Force roundel: white-red)
        Ecuador - red-blue-yellow
        Estonia - white-black-blue
        Finland - white-blue-white
        France - blue-white-red
        
        
        
        • (the French navy's Naval Aviation roundel have a black anchor drawn upon the cockade)
          Germany - black-red-gold
          
          
          
          • (1871-1945: red-white-black)
            (German Confederation 1848-1871: gold-red-black)
            Great Britain -
            
            
            
            • Royal House of Stuart: orange
              Royal House of Hanover: black
              (RAF, FAA and AAC roundels: red-white-blue or red-blue)
              Greece - blue-white
              
              
              
              • (Hellenic Air Force roundel: blue-white-blue)
                Hungary - green-white-red (oval shaped as opposed to round, with gold metal border)
                Iran - red-white-green
                Ireland - green-white-orange
                
                
                
                • (until 1922: green or sky blue)
                  Italy - green-white-red
                  Japan - red with white edge (the Hinomaru, worn as a cockade by civilian officials before World War II)
                  Mexico - green-white-red
                  Monaco - red-white
                  Netherlands - orange
                  Norway - red-white-blue-white
                  Paraguay - blue-white-red
                  Peru - red-white-red
                  Poland - white-red
                  Portugal - white-green-red
                  
                  
                  
                  • (until 1910: blue-white)
                    Romania - blue-yellow-red
                    Russia -
                    
                    
                    
                    • military - black-orange-black-orange (the Ribbon of Saint George)
                      police - red-blue-white
                      (Army Air Service roundel until 1918: white-blue-red)
                      San Marino - white-blue
                      Spain - red-yellow-red
                      Sweden - yellow-blue-yellow
                      Turkey - red-white-red
                      United States - (white-blue-red, widely used on A.E.F. aircraft 1917-18. Also, blue with a gold eagle reportedly used late 19th century)
                      Uruguay:
                      
                      
                      
                      • military - blue-white-blue with a red diagonal stripe (Artigas's Cockade)
                        police - red-white-blue
                        civilian - white with four blue rings
                        Venezuela - red-blue-yellow
                        Yugoslavia - blue-white-red