Olympic symbols rings are five interlocking rings, coloured blue, yellow, black, green, and red on a white field, known as the "Olympic rings". The symbol was originally designed in 1912 by de Coubertin. He appears to have intended the rings to represent the five continents: Europe, Asia, Africa, Oceania, and America. According to Coubertin, the colours of the rings together with the white of the background included the colours composing every competing nation's flag at the time. Upon its initial introduction, Coubertin stated the following in the August 1912 edition of "Olympique": In his article published in the "Olympic Revue" the official
Iron rings Iron rings Iron rings are heavy metal rings used in martial arts for various training purposes. Metal rings have a long history of being used in Yau Kung Mun, Hung Gar, and other styles for weight training, to harden the muscle, skin, or bone, or strengthen the arms and fists. Many different types of rings are available. The "Chi Sau Ring" is used for conditioning the body in many stances, and exercises. Four-inch-diameter () "Chi Sau Rings" weigh 600 g; iron rings weigh 800 g. Some iron rings are sold in sets, such as two small and two large rings.