Why is a cricket pitch the length that it is?

A cricket pitch is the central strip of the cricket field between the wickets. The pitch is 1 chain or 22 yards (20.12 m) long and 10 feet (3 m) wide. The surface is very flat and normally covered with extremely short grass though this grass is soon removed by wear at the ends of the pitch. The chain was commonly used with the mile to indicate land distances and in particular in surveying land for legal and commercial purposes. In medieval times, local measures were commonly used, and many units were adopted that gave manageable units; for example the distance from London to York could be quoted in inches, but the resulting huge number would be unmemorable. The locally used units were often inconsistent from place to place The pitch has very specific markings delineating the creases, as specified by the Laws of Cricket