In arena polo, there are 3 instead of traditional four players on each team and chukkas are 7 1/2 minutes in length. The playing area is 300' x 150' for polo and goals are scored by passing the ball into a 10' goal receded back from the sideboards. On the other hand, the Arena polo in general, uses a ball between 12.5" and 15" inches in circumference and looks like a miniature soccer ball. But this is not the only form in the modern age. There is also another modern variant, which is known as snow polo and is played either outdoor or indoor on snow, on a frozen ground or ice. In this modern class of the traditional form of polo, each of the participaing teams is consisted of of three players and also the equipments do differ from the sport of polo. However, with the passing of days there have also been the introduction of other forms, among which elephant polo, bike polo and last but not the least, segway polo are most prominent. However, these sports are considered as separate sports because of the prevalence of differences in the composition of teams, equipment, rules, game facilities etc.
But when did polo origin? According to history, the sport of Polo was first played in Persia (modern Iran), from the period of the 6th century BC to the 1st century AD. Though at the beginning it used to be a training game for the cavalry units, usually the king's guard or other elite troops, but to the warlike tribesmen who used to play with at least 100 men to their side, was nothing less than a miniature battle. But in the modern days, though the game was both formalized and popularized by the mighty British, in general, it is derived from the princes of the Tibeto-Burman kingdom of Manipur, in India. The first polo club was established in the town of Silchar in Assam, India, in 1834, as the part of royal gesture. There is indeed a deep relation between polo and aristocracy.