The 55 cm Exercise Ball by TheraBand is designed for people between 5'1" to 5'6" tall, making it suitable for full-body workouts. This red plastic ball has a diameter of 55cm and weighs 2.76 pounds, making it ideal for gym and training activities. With its compact package dimensions of 9.69x8.19x5.16 inches, this exercise ball offers a convenient and effective way to strengthen and tone muscles at home or in the gym.