"Size: 12"" x 5.5"" (30.5 cm x 14 cm) The Mod Zafu Provides moderate lift to sit bones during your deep meditation sessions Perfect meditation Pillow if you have flexible hips but do not need space to tuck your feet If you prefer to lie down flat during your meditation session, the Mod Zafu's shape will support anycross legged position or lotus position If you prefer to kneel, turn on its side, and it offer great comfort and support to your knees 100% cotton twill cover of the bolster for breathability and absorbency The Mod 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.