Metallic Silver 5×7 Cardstock for Invitations Card (5.125 x 7 inches): metallic color 86# heavyweight 30% recycled FSC and Green Seal certified acid free processed chlorine free. A shimmering silver color. Background cards are used for our unique layered invitations. A printed white or vellum overlay embellishment and envelope is required to complete the look. Click to view complete list of blank invitation supplies.