Fits perfectly for a steering wheel diameter of 37 to 38cm. Made of smooth and durable microfiber leather. Protects from cold in winter and heat in summer. Easy to install. Brings bright colors to your car. Universal Size: Suitable for most steering wheels with a diameter of 37-38 cm. Important note The diameter of your steering wheel determines whether our steering wheel cover fits your car. If you are unsure if our product is suitable for your car, please measure the diameter of your steering wheel. Installation is generally easy for 37 and 38 cm steering wheels. If you have difficulty with the 39cm steering wheel, try warming up the steering wheel cover for 3-5 minutes with a hair dryer. It will expand to fit your steering wheel perfectly. No tools required. The steering wheel cover has a snug fit, so a strong pair of hands is enough.