Shoulder Stand Foam Block [2] Made from recycled plastic products, these foam blocks are great to add support and comfort during shoulder stand or seated postures. They're also great to use when a regular-sized bamboo or foam block is too high. Comes in a set of 4 so you can use each block alone, or group them together to form a large padded surface. Each block measures 2" x 10" x 12". 4 blocks for $32.95.