Issue link: http://itf.uberflip.com/i/231525
i. Grass Court Shoes At Wimbledon no grass courts shoes other than those with rubber soles, without heels, ribs, studs or coverings, shall be worn by players. Special grass court shoes will not be used without the express approval of the GSB; such shoes will not be approved unless they comply with the following specifications: The pimples or studs on the base of the sole shall have maximum top diameter of three (3) millimetres and a minimum top diameter of two (2) millimetres. The maximum height of the pimples or studs shall be two (2) millimetres with a maximum of 10 degree angle slope between the base and the top of the pimple. The durometres shall be between 58 and 63 based on a shore "A" scale. The pimple top diameter compared to its respective pimple density per square inch shall be within the following guidelines: Pimple Top Diameter 2.00 mm 2.25 mm 2.50 mm 2.75 mm 3.00 mm Pimple-Density Per Square Inch 32 28 24 21 18 Shoes with pimples or studs around the outside of the toes or on the sides shall not be permitted. The foxing around the toes must be smooth. As an alternative to the above specifications, players may also use the special grass court shoes developed, tested and approved by Wimbledon. These special grass court shoes are available from the GSB upon request. Players desiring approval of special grass court shoes should submit a sample shoe to the GSB at least ninety (90) days in advance of Wimbledon. ii. Clay Court Shoes Players are required to wear tennis shoes generally accepted for play on clay courts. The Referee has the authority to determine that a tennis shoe's sole does not conform to such customs and standards and can prohibit its use at Roland Garros. Grass court shoes shall not be worn during a match at Roland Garros. 38