Home#RMNOnline Shop Now: Tennis/Running Skirt (RMNOnline.net) Richard John July 02, 2019 Shop Now: Tennis/Running Skirt. Featured at RMNOnline Fashion Group (#RMNOnline). 14 inches long, this skirt is great for running or tennis with compression undershorts. Key pocket at waist. Comes in two sizes, 1 is (0-8) and 2 is (10-16).