2 55cm, 2 65cm

Quoted: When you need firm support under heavy loads, choose the VersaBall® PRO. It’s designed for dynamic workouts that incorporate moderate levels of resistance. PVC. Available in 3 sizes. Order by user's height (see chart below). A tape measure is included to ensure proper ball inflation. Deflates slowly if punctured. 5 lbs. or less (varies by size).