Diameter: 45 cm. Gymnic Ball: The Gymnic fitness ball with plug closure is used in pregnancy and therapeutic gymnastics. It is also a very popular training device in health and rehabilitation sports. Whether you sit on it, bounce, or roll over it, the Gymnic fitness balls offer a variety of exercises. A detailed exercise manual is included with your order. This gymnastic ball is also very popular for the trend sport of Beach Jumping. The right Gymnic fitness ball according to body height: up to 152 cm: 45 cm, 152–169 cm: 55 cm, 164–181 cm: 65 cm, 182–192 cm: 75 cm. The ball sizes of 95 cm and 120 cm are used for different gymnastic exercises, so there are no body height specifications for these. Load capacity: up to 300 kg, up to 250 kg, up to 200 kg, up to 150 kg. Ball type: sitting ball, large gymnastic ball, fitness ball. Area of use: rehabilitation, therapy. Diameter: 45 cm. Max. load capacity: 300 kg. Material: plastic (latex-free).