Subway tile refers to a type of rectangular ceramic tile that is commonly used in interior design, particularly for walls. Originally popularized in the early 20th century in New York City subway stations, these tiles typically measure 3 inches by 6 inches. They are known for their glossy finish and clean lines, making them a favorite for kitchens and bathrooms. These tiles are available in various colors and finishes, allowing for versatile design options. Their simple, classic appearance can complement both traditional and modern styles. Additionally, subway tiles are easy to clean and maintain, contributing to their enduring popularity in home decor.