Everything Yoga Crescent Zafu Meditation Cushion (with Buckwheat Hulls) Whether you are using it as a cushion on top of a chair, or simply as a free-standing chair itself, you'll find that our zafus are not only comfortable, but the perfect size for meditation and relaxation. Each zafu measures 15in x 6in, and are stuffed with 100% organic buckwheat hulls. Aside from being a great Yoga prop, zafus are also a beautiful addition to the decor of your home!