The Tucson SG 5000 Gauss stainless magnetic bracelet has 5/8" wide x 3/8" long links. It has one 4mm magnet in each link totaling 22 rare earth magnets in 8 3/4" length. It has a magnetic therapy pull strength of 650 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.