Museum-quality posters made on thick and durable matte paper. Add a wonderful accent to your room and office with these posters that are sure to brighten any environment. 12x12" 18x18" • Paper thickness: 10.3 mil • Paper weight: 5.57 oz/y² (189 g/m²) • Giclée printing quality • Opacity: 94% • ISO brightness: 104%