Getting your player ready...
Stability balls are not one-size-fits-all, so refer to the following guidelines for a proper fit:Ball size/Your height
Small (45cm) : 4-feet-6 to 5-feet
Medium (55cm): 5-1 to 5-7
Large (65cm): 5-8 to 6-1
X-large (75cm): 6-2 to 6-7
XX-large (85cm): Over 6-7
Source: Resist-a-Ball
