These bracelets are made with 14k gold filled beads which means they will not tarnish! We've tested them in the shower, pool, lake, ocean, and they still look as good as new!  The standard size for the bracelets is 6.75 inches. You may request custom sizes in the personalization box. We can make bracelets for children as well, but please measure their wrists for the most accurate sizing. Please reference the chart posted in the photos if you are unsure of size, but know it may not be a perfect fit unless you provide exact measurements.