Key of Heaven Four-Way Combination Medal- Sacred Heart of Jesus, Miraculous Medal, Holy Spirit, St. Christopher Solid .925 sterling silver. Medal is die struck. Hand polished and engraved by New England Silversmiths. Dimensions: 1.4" x 0.7" (36mm x 18mm) Weight of medal: 2.9 Grams. 18" 316 Surgical stainless steel curb chain. Made in USA. Deluxe velvet gift box.