"Size: 20” x 11” x 5’’ The Halfmoon Zafu Yoga Pillow offers comfort & support during long meditation sessions The pillow gives sit bones lift & support alleviating lower back strain This a great meditation pillow if you have flexible hips A perfect meditation pillow for if you like to tuck your feet close to your body as you sit upright Its Halfmoon Zafu shape provides great comfort and support all lotus and cross-legged meditation positions If you prefer to kneel during your meditation session, the Halfmoon Zafu lends itself to provide great knee support 100% cotton twill cover of the bolster for breathability and absorbency The Halfmoon Zafu Yoga Meditation Pillow offers comfort & support during long meditation sessions for all lotus and cross-legged positions, great knee support and gives sit bones lift to support alleviating lower back strain. Its 100% cotton twill cover gives breathability and absorbency.