The size of a basketball, used in the sport of basketball, is regulated by official organizations like FIBA (International Basketball Federation) and the NBA (National Basketball Association) to ensure uniformity and fairness in the game. Here are the standard sizes for basketballs:

  1. Official NBA Size (Size 7): The official NBA basketball size is the most common size used in professional men's basketball. It has a circumference of 29.5 inches (75 cm) and weighs approximately 22 ounces (624 grams).

  2. Intermediate or Women's Size (Size 6): This size is typically used in women's professional and college basketball. The circumference is slightly smaller than the official NBA size, measuring 28.5 inches (72 cm), and it weighs around 20 ounces (567 grams).

  3. Youth Size (Size 5): Youth basketballs are smaller and lighter to accommodate the physical abilities of younger players. The circumference of a youth basketball is 27.5 inches (70 cm), and it usually weighs about 18 ounces (510 grams).

  4. Mini or Micro Mini Size (Size 3 and Size 1): These miniature basketballs are designed for children and beginners. Size 3 has a circumference of around 22 inches (56 cm), while Size 1 is even smaller, with a circumference of about 16 inches (41 cm).They are extremely light and easy to handle for young kids.

The choice of basketball size depends on the age and gender of the players as well as the specific league or organization's regulations. Using the correct size basketball is important for skill development and fair competition in the sport of basketball.