Duraball Pro 55cm Exercise Ball - Canada Fitterfirst
Theragear 55cm Pro Ball
Memory Ball 55cm - Fitball Australia Fitness Equipment
Evoke 55cm Exercise Ball | Sportchek
Pure Fitness 55-cm Stability Exercise Ball at Lowes.com
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