Museum-quality posters made on thick matte paper. • Paper thickness: 0.26 mm (10.3 mil) • Paper weight: 189 g/m² • Opacity: 94% • ISO brightness: 104% • 21 × 30 cm posters are size A4 • Paper sourced from Japan This product is made especially for you as soon as you place an order, which is why it takes us a bit longer to deliver it to you. Making products on demand instead of in bulk helps reduce overproduction, so thank you for making thoughtful purchasing decisions!