Store › Lunar Waves Postcard Image 1 of 1 Lunar Waves Postcard $4.00 Make waves with this original artwork by Cal Rustad. These postcards are made from thick high-quality matte paper. • Cardboard paper • Paper weight: 7.67–10.32 oz/yd² (260–350 g/m²) • 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 Add To Cart Added! Make waves with this original artwork by Cal Rustad. These postcards are made from thick high-quality matte paper. • Cardboard paper • Paper weight: 7.67–10.32 oz/yd² (260–350 g/m²) • 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