Protect your bowling shoes when leaving the lane by slipping a pair of these covers right over them. They¡¯re made of high-quality vinyl with an elastic top to keep water, mud and dirt off your shoes. Robby"s Size Guide. Ladies Small: 5 to 8 1/2. Ladies Medium: 9 to 11. Ladies Large: 12+. Mens Small: 5 to 7 1/2. Mens Large: 8 to 9 1/2. Mens X-Large: 10 to 12 1/2. Mens XX-Large: 13+