Sketchbook Premium Mixed-media 150 g/m² Stillman & Birn 23x30cm Mixed media notebook spiral bound with black cover. 50 sheets White. Thick 150 g/m² paper with a medium grain ivory tint. Perfect for dry techniques, light washes, ink, marker, drawing and multi-techniques without applying too much liquid. Color of the lids: black Acid-free, neutral pH. < li class="a-spacing-small">Vertical orientation. Size: 22.9 x 30.5 cm Brand: Stillman & Birn