How big is 13cm in inches? Leave a Comment / GeneralGreatest Reply13 centimeters are 5.1181102362 inches.Read More: What tims is 9pm PST in Central time? How many linear ft in 1 acre? Related posts:What is half of 150? How many cups is 250 grams of flour? How tall is 15 inches? Did builderman die? What do a former employee mean? READ: What are the lyrics to happy llama sad llama?