Yoga Mat 6 MM Definition - What does Yoga Mat mean? A yoga mat is a type of mat that is made specifically for practicing yoga. It provides a non-slip and cushioned surface, which makes it easier to perform yoga asanas safely and comfortably. Yoga mats typically measure about around 72 inches (182 centimeters) long and 24 inches (60 centimeters) wide; although, there are wider variations. In terms of thickness, they start at 2 millimeter and run up to 7 millimeter, with 4 to 5 millimeter being the most common thickness. A wide variety of yoga mats are now sold worldwide. They come in a vast array of colors, patterns and styles. Some are eco-friendly, while others are designed to be easy to carry around and use anywhere.