This product can install a steering wheel with a diameter of 35-37 cm. However, It is very difficult to install a steering wheel with a diameter of 38 cm. Need some skill and strength. I have made an installation video of a 38cm diameter steering wheel, which can be viewed on the product page. It is a bit difficult, but it can be installed successfully. Product description Descriptions : Hight Quality Suede Material Car Steering Wheel Coveruniversal sweat-absorbent anti-slip hand sewing steering wheel cover. Car Steering Wheel Cover Leather Size 35- 37cm For 95% Cars. This Thickening steering wheel cover improves the appearance of old or dirty steering wheels and protects hands from hot and cold extremes. fits most standard steering wheels. Diameter selection: Fits 14.6 i nch ( 35 - 37cm ) steering wheel Cover Width: Approx. 4.1 inch / 10.5 cm Material: Suede Note: Measure the outer diameter of your steering wheel and select the cover with apporpriate size. Package includes : 1 x steering wheel cover 1 x sewing needle 1 x sewing thread Note: Please be reminded that due to lighting effects and monitor"'"s brightness/contrast settings etc, the color tone of the website"'"s photo and the actual item could be slightly different. Due to differences in shooting equipment, displays, and production batches, the product may have slight color differences. This is normal, please refer to the actual product. We have tried our best to restore the true color through professional equipment, but we still recommend that you watch it under natural light for the most accurate visual effect.