Sturdy Stable Lightweight Easy To Transport Beveled Edges For Comfort PurpleOur 4 inch Foam Block offers three useful dimensions, 4 inch, 6 inch, 9 inch, to aid in your yoga practice. Use them to ground your lower hand in standing poses, to space the hands in peacock pose, or to support your hips in bridge pose. They are lightweight and durable making them great for travel.