TheraBand Exercise Ball, Stability Ball with 55 cm Diameter for Athletes 5'1" to 5'6" Tall, Standard Fitness Ball for Posture, Balance, Yoga, Pilates, Core, & Rehab, Red : Amazon.ca: Sports & Outdoors
Stability Ball 55 cm - 55 cm | Club Piscine Super Fitness
Everlast FIT Pro Grip Fitness Balls - 65cm - Burst-Resistant, Anti-Slip, Pump Included, Great for Balance, Home Workouts, Yoga. (Available in 55cm, 65cm and 75cm) (Red, 65cm) : Amazon.ca: Sports & Outdoors