• Exercise balls are used to improve balance, coordination, flexibility, strength and even just for fun.  Balls are used by pediatric and NDT therapists as an aid for vestibular movement and equilibrium therapy, by fitness professionals as an aid for stretching and strength programs, as seats, and even by pregnant women in birthing classes.
• The Cando® balls have a non-slip PVC vinyl surface that is ribbed for extra security. The balls may be "under" inflated to give a soft, mushy feel or "over" inflated for a firm, bouncy feel. 
• See sizing chart to choose proper size ball.  Balls can support up to 600 pounds (275kg) and come in a polybag or a box designed for retail display.
• Ball Sizing Chart suggested

ball diamater	body height
45cm   17.7in.	under 142cm  56in
55cm   21.6in.	143cm 57in. to 160cm  63in.
65cm   25.6in.	161cm  64in. to 182cm  72in.
75cm   29.5in.	183cm  73in. to 200cm  79in.
85cm   33.5in.	over 200cm  80in.

• Inflation Instructions
  Ball size reflects maximum inflation. An electric inflator may be used to inflate the ball to its approximate size. Maximum size may be realized only by finishing the inflation process using a foot pump