I took this excerpt off my suppliers site, for those of you who have never heard of Sterling silver filled wire. 'This high quality wire from Germany is made specifically for the jewelry-making industry, and is considered by many to be second only to solid sterling silver. It is made by bonding sterling silver to a pure copper core. It resists tarnish, and because it is bonded, it wears well, and it contains more sterling - and is of a much higher quality - than plated or coated wire'. The glass beads are a beautiful greyish blue & have a cat's eye quality about them. Great with your favorite jeans & t-shirt, or dress up that sexy black dress! Earrings measure 1in / 2cm without ear wires.