Material: 925 Sterling Silver Size: Square is 10mm by 10mmRing: 2.8mm ring, 0.9mm inner diameter ( so it fits 19 gauge rings and wire)Gauge: 20 gauge, 0.8 mm thickStyle: Smooth square, fancy earwireQuantity: one pair, 2 piecesSKU: 203060Usage: Bottom ring is closed, use wire or jump rings to attach chains, pearls, beads or charms. Personalize this piece!* 925 Butterfly backs included