Measure your height and refer to the manufacturer’s recommendations. Exercise balls typically range from 45 cm to 85 cm in diameter. For instance, individuals between 137 cm and 152 cm (4’6″ and 5’0″) should opt for a 45 cm ball, while those between 175 cm and 188 cm (5’9″ and 6’2″) would benefit from a 65 cm ball. Who Should Use an Exercise Ball?

A: The regulation tennis ball size is 2.7 inches (6.86 cm) in diameter. Q: Are there different tennis ball sizes for different skill levels? A: No, the size of tennis balls remains the same regardless of skill level. It’s the weight and compression that vary for different skill levels.

There are different sizes of tennis balls. The standard size as per the International Tennis Federation however is 2.575 inches or 6.5 cm and 6.85 cm or 2.700 inches in diameter.

Exercise balls are large, inflatable balls used during workouts, physical therapy or as a replacement for your desk chair. They range in size and air pressure, depending on your height and how you want to use it. Before you pick just any stability ball, though, find the best size for your height to get your core firing.