Our ear wire is handcrafted from 22 gauge sterling wire. Each pack contains 10 pieces, or 5 pairs, of earring wire. Since they are handcrafted, slight variations occur. Each ear wire is roughly 1/2" wide and 5/8" long. Our sterling consists of 92.5% silver and 7.5% copper. It is not coated and in its natural state, so tarnish will occur.