The flag of Thailan shows five horizontal stripes in the colours red, white, blue, white and red, with the middle blue stripe being twice as wide as each of the other four. The three colours red-white-blue stand for nation-religion-king, an unofficial motto of Thailand. The flag was adopted on 28 October 1917. The Thai name for the flag is ธงไตรรงค์ (Thong Trairong), which simply means tricolour flag.