Johntoy hula hoop Try to spin the hula hoop around your waist as often as possible. Is this a success? Then try it alone on your arm or leg. You learn good rhythmic movement and it is also a fun activity. The hula hoop has a beautiful laser print and is filled with water for a good balance! The diameter of the hoop is 73 centimeters. Specifications: Color: blue/yellow/pink/purple/green Gender: junior Material: plastic Diameter hula hoop: 73 cm Age: from 3 years old Note the hula hoop there are three different colors. It is not possible to choose in color.