A classic element of physical education, dance class, and recess. Colorful 3/16" (1/2 cm) dia rubber cord is durable and resilient. Pack includes 8 single-loop 8'L/2.5 m ropes, 2 double-loop 16'L/5 m ropes for group jumping, and the instructional DVD, MelAimee Chinese Jump Rope. It features 11 fun and easy games for the very popular and challenging game that helps build coordination and endurance. 42 minutes. Additional Sets of 6 Jump Ropes with storage bags sold separately.