Our popular design expandable magnetic bracelets take advantage of magnetic therapy by containing 6 magnets 500 gauss/50 mTesla). These large magnets are enclosed in the square plates on the magnetic bracelets, allowing the magnetic field to spread over a wider area on the wrist and therefore increases the effectiveness of the bracelet. They are expandable to fit almost any wrist size. These stainless steel magnetic expandable bracelets come in either a gold or a silver finish and are 3/8" wide (0.9mm)