Each box set features eight folding cards with white envelopes, two in each shell design, plus a sheet of eight coordinating stickers. Featuring scallop, clam, junonia and conch shells, each painted in watercolor with a coordinating watercolor stripe on the card back. Folded cards measure 4.25 x 5.5 inches (A2 size) and are blank inside. Printed on a thick, matte paper.