When you seriously want the top of the line therapy magnet for full body pain relief and the many other attributes of magnetic therapy, select the one with the most power for the size complete with kit including instructions and a medical wrap to help hold the magnet in place. 1.25" x 3/4" x 1/4". 14,000 gauss. You simply do not need anything more powerful than this and you will not find a finer magnet regardless of what others may charge. This magnet will maintain it's awesome power indefinitely and is a grade N52 rare earth neodymium magnet.