Floorball is a type of floor hockey with five players and a goalkeeper in each team. Men and women play indoors with 96–115.5 cm-long (37.8–45.5 in) sticks and a 70–72 mm-diameter (2.76–2.83 in) plastic ball with holes. Matches are played in three twenty-minute periods. The sport of bandy also played a role in the game's development. The game was invented in Sweden in the late 1960s. The basic rules were established in 1979 when the first floorball club in the world, Sala IBK, from Sala, was founded in Sweden. Official rules for matches were first written down in 1981.