Muay Thai official rules from the Sport Organization of Thailand Rules 1 – The ring For an ordinary competition, the ring shall consist of the following: rules * The ring must be square. The small size ring measures 20 feet (6.10 meters) each side and the big size ring measures 24 feet (7.30 meters) each side. The measurements is done by the inside of the ropes. rules * There should be 3 ropes with the diameter of at least 1,90…