Size: 6.5 x 4 cm (2.56 x 1.57 inch)
The rings are five interlocking rings, colored blue, yellow, black, green and red on a white field, known as the "Olympic rings". The symbol was originally designed in 1912 by Baron Pierre de Coubertin, co-founder of the modern Olympic Games. He appears to have intended the rings to represent the five participating continents: Africa, Asia, America, Australia and Europe. According to Coubertin, the colors of the rings together with the white of the background included the colors composing every competing nation's flag at the time.
The Olympic flag was created by Pierre de Coubertin in 1914. (source: wikipedia)