YFN Sterling Silver Celtic Good Luck Knot Round Medallion Pendant Necklace 18" Material: 925 Sterling Silver Celtic Good Luck Knot Pendant with 18" Necklace Pendant Size:28*20MM Weight: 3.71 Grams. Wearing sterling silver prevent allergy,long time wearing keeps you a good health. It makes a beautiful gift to your special someone or a nice little treat for yourself. Comes with YFN Jewelry Box