"The popular Aztec design is highlighted in this copper bracelet. Always keep the inside of the bracelet clean, but let this design wear and turn dark on the outside for that weathered look if that is what you like. Since it is pure copper you can always polish it up if you want. An 1800 gauss samarium cobalt magnet is in each tip! 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"" from your wrist size to determine the size Sabona Copper Wristband you need. Sizes are Small (5.5""), Medium (6.0""), Large (6.5"") or Extra Large (7.0""). 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.