Yoga blocks are a fantastic prop:they are super versatile, offering you additional support in many different yoga poses and asanas - from a seated forward fold to a shoulderstand. A yoga block is normally used in a pair, but many may be required depending on the pose and your level of ability. Yoga blocks are a great way of finding correct alignment, as well as cushioning & comfort during your yoga practise. The Yoga-Mad full yoga block is available in a choice of 4 colours and sold separately. Non-toxic, scratch-resistant first grade EVA foam with 3mm chamfered edges.Product details: Dimensions - 30.5cm x 20.5cm x 5cm Density - 42kg/cbm