Stillman & Birn Zeta Wirebound Sketchbook 7" x 10" Stillman & Birn from $21.56 $26.95 Qty. Add to Cart SKU: SB900710 This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Stillman & Birn Zeta Wirebound Sketchbook 7" x 10". Stillman & Birn ZETA Series Sketchbooks feature 80 lb. (270 gsm), Natural White, Smooth surface paper. Excellent for multi-media artwork. Tweet