dimensions: length 10.87", width 6.25", height 4.9". weight 1 lb / 16 oz. pso-back is made in the USA. patented u.s. pat. no. d908,236. consult with your doctor before using this product. versatile and precise: targets deep, specific and difficult-to-access muscles. use it at home, or take it to the gym or the office for relief any time of day. the pso-back is as versatile as it needs to be for your lifestyle. deep tissue massage on demand: the pso-back can provide relief first thing in the morning if you awake with stiffness. it can be used as a fantastic massage tool when placed behind you in your chair while sitting, and it can also help decompress and stretch the spine after a long day on your feet. your massage therapist wherever you need it: losing the natural curvature of the spine spells disaster for anyone. the pso-back uses hard nodes mimicking a therapist's thumb in combination with a gentle curve, which allows you to release muscular tension, decompress, and stretch the spine providing relief for pinched nerves, herniated discs, and spinal stenosis. highly innovative back release tool: the pso-back helps release muscle tissue and trigger points which surround the lower spine and reduce your ability to rotate, flex, and extend the spine creating undesirable stiffness.