Product Information Material: High Quality Polyester Size: 14 Inch, 15 Inch, 16 Inch, 17 Inch Package: 1 X Spare Tire Cover Cover Size Guide Tire sizes are listed in the detailed description below; please measure before purchasing. Cover Size 14" fits tire diameter 60-69cm/23-27inch Cover Size 15" fits tire diameter 70-75cm/27-29inch Cover Size 16" fits tire diameter 76-79cm/29-31inch Cover Size 17" fits tire diameter 80-83cm/31-33inch Spare Tire Cover Diameter Calculation Guide Step 1: Find your tire parameter. It's written on your tire side Step 2: Calculate your tire diameter. If your tire is labeled P225/65R17, A=225, B=65, C=17. Tire Diameter = A*B/500 + C*2.54 = 225*65/500 + 17*2.54 = 72.43cm According to the sizing guide, 15" spare tire cover is the size that fits your spare tire. Product performance: The silver-coated sunshade fabric helps prevent dust, water splashing, sun damage, and corrosion, enhances vehicle appearance, and keeps the spare tire clean. Applicable scenario: Universal model fits jeeps, trailers, SUVs, trucks, and other vehicles. Accessory structure: Equipped with nylon rope and buckle for adjustable fit, easy to install and remove without tools. Washing instructions: Recommended to wipe clean with a damp cloth. Note: Please allow 1-2 cm deviation due to manual cutting and sewing. Motor Vehicle Wheel Parts Vehicle Wheel Parts