The Santa Fe S magnetic bracelet has a 9/16" wide x 11/32" long link with one 4.5mm diameter 5000 gauss N50 rare earth magnet in each link. It has 21 magnets in 8 3/4" length. It has a magnetic therapy pull strength of 670 grams. Magnetic bracelets are the strongest magnetic therapy for hand (arthritis tendinitis), wrist (arthritis, tendinitis, carpal tunnel), elbow (arthritis, tendinitis) and shoulder (bursitis, tendonitus, frozen shoulder) on the arm they are worn. However magnetic bracelets will often help neck, back and knees. Determine magnetic bracelet size by measuring the circumference of the wrist and adding 3/4 inches.