The copper barb magnetic bracelet is just that and with a western flair. Each tip has an 1700 gauss samarium cobalt magnet. Sabona chooses samarium cobalt magnets for long term durability and rust-resistant qualities. Sabona copper wristbands are made with the purest copper available 99.99%. All styles are designed for comfort and manufactured to maintain shape and quality appearance. To get the best fit, subtract 1/2 to 3/4 in from your wrist size to determine the size Sabona copper wristband you need. Wristbands are to be snug, but not tight. If you are in between sizes, it works better for the band to be smaller rather than larger.