Colorful hoops are safe for use indoors or outdoors. Crafted of quality plastic that stands up to the toughest treatment, year after year. Vibrant hoops come in every color of the rainbow. Box of 30" diameter plastic hoops includes two each of blue, red, yellow, green, orange & purple. 12 hula hoops per box. Diameter: 30"; Material(s): Plastic; Playground / Gymnasium Sets Type: Hula Hoop.