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2. Ball (association football) - Wikipedia

   en.wikipedia.org/wiki/Ball_(association_football)

   Regulation size and weight for a football is a circumference of 68–70 cm (27–28 in) and a weight of 410–450 g (14–16 oz). The ball is inflated to a pressure of 0.6–1.1 bars (8.7–16.0 psi) at sea level. [20] This is known as "Size 5". Smaller balls, Sizes 1, 3, and 4, are also produced for younger players or as training tools. [20]

3. Baseball (ball) - Wikipedia

   en.wikipedia.org/wiki/Baseball_(ball)

   A baseball is the ball used in the sport of baseball. ... there was a great variety in the size, shape, weight, and manufacturing of baseballs. Early baseballs were ...

4. Football (ball) - Wikipedia

   en.wikipedia.org/wiki/Football_(ball)

   Adidas Tricolore, the official ball for the 1998 World Cup. Law 2 of the game specifies that the ball is an air-filled sphere with a circumference of 68–70 cm (27–28 in), a weight of 410–450 g (14–16 oz), inflated to a pressure of 0.6 to 1.1 atmospheres (60–111 kPa or 8.7–16.1 psi) "at sea level", and covered in leather or "other suitable material". [7]

5. Basketball (ball) - Wikipedia

   en.wikipedia.org/wiki/Basketball_(ball)

   Men and boys ages 15 and up. This is the official size for men's high school, college, and professional. 6: Women: 715–730 mm 28.1–28.7 in [4] 510–550 g 18–19 oz [4] Boys ages 12–14. Women and girls ages 12 and up. This is the official size for women's high school, college, and professional. 5: Youth (North America) [3] Mini (FIBA) [4 ...

6. List of Olympic Football official match balls - Wikipedia

   en.wikipedia.org/wiki/List_of_Olympic_Football...

   Official Match Ball Manufacturer Additional Information 1952 Olympic Games: Super Olympia: Select Sport: 1956 Olympic Games: Super Olympia: Select Sport: 1960 Olympic Games: Super Olympia: Select Sport: 1964 Olympic Games: Super Olympia: Select Sport: 1968 Olympic Games: Adidas Telstar Elast: Adidas: Variant of Adidas Telstar: 1972 Olympic ...

7. Handball - Wikipedia

   en.wikipedia.org/wiki/Handball

   A size III handball. The ball is spherical and must be made either of leather or a synthetic material. It is not allowed to have a shiny or slippery surface. As the ball is intended to be operated by a single hand, its official sizes vary depending on age and gender of the participating teams.