Your question was: What is the proper inflation size of the Exercise Ball?
Our experts said: The size of the ball (45 cm, 55 cm, etc) refers to the HEIGHT of the ball, not the circumference. Use a tape measure to determine the height of the ball. The proper inflation size for each ball is noted by ball color:
Ball Type |
Ball Color |
Maximum
Ball Size
(inches/centimeters) |
Initial
Inflation Size
(inches/centimeters) |
Standard |
Yellow |
17.7 inches
/ 45 cm |
16.5 inches
/ 42.0 cm |
Red |
21.7 inches
/ 55 cm |
20.5 inches
/ 52.0 cm |
Green |
26.6 inches
/ 65 cm |
24.0 inches
/ 61.0 cm |
Blue |
29.5 inches
/ 75 cm |
28.0 inches
/ 71.0 cm |
Silver |
33.5 inches
/ 85 cm |
31.5 inches
/ 80.0 cm |
SDS® |
Yellow
|
17.7 inches
/ 45 cm |
16.5 inches
/ 42.0 cm |
|
Red |
21.7 inches
/ 55 cm |
20.5 inches
/ 52.0 cm |
|
Green |
26.6 inches
/ 65 cm |
24.0 inches
/ 61.0 cm |
|
Blue |
29.5 inches
/ 75 cm |
28.0 inches
/ 71.0 cm |