Size: 65 CM. Too much sitting, too little movement... that's how it is for most French people in the office. In such cases, the consequences are predictable: many people regularly suffer from back problems, tension and headaches. But this can be avoided with an exercise ball. This support is ideal for strengthening your back and abdominal muscles. We offer colored balls in three sizes (55, 65 and 75 cm) and six colors. The benefits of our gym balls:Durable synthetic rubber. Includes air pump for easy inflation. Durable, resistant design: supports up to 500 kg load. High seating comfort, ideal for a healthy spine. Easy to transport empty thanks to the valve. Balloon supplied with gusset for inflation. Suitable for people with a height between 1.60 m and 2.05 m. Dimensions : Gym ball diameter: 55cm, 65cm or 75cm. Colors: blue / grey / fuchsia / black / red / green. Several sizes for a perfect fit The gymnastic ball is available in several diameters: 55 cm, 65 cm and 75 cm. If your height is less than or equal to 1.60 m, the 55 cm diameter ball will be the best fit. If you're taller, with a height of 1.80 m or less, we recommend a 65 cm diameter. If you're taller than that, the 75 cm diameter will suit you perfectly. Different versions:Blue color - diameter 55 cm, 65 cm, 75 cm. Grey - diameter 55 cm, 65 cm, 75 cm. Green - diameter 55 cm, 65 cm, 75 cm. Pink - diameter 55 cm, 65 cm, 75 cm. Red - diameter 55 cm, 65 cm, 75 cm. Black - diameter 55 cm, 65 cm, 75 cm.