These postcards are made from thick high-quality matte paper, so they serve as a great addition to a gift or just a thoughtful written note to a friend. Cardboard paper Paper weight: 7.6710.32 oz/yd (260350 g/m) Size: 4 6 (101 152 mm) Paper thickness: 0.013 (0.34 mm) Coated outer surface Blank product materials sourced from Sweden, US, Brazil, or China