Stillman & Birn Zeta Series Softcover Sketchbook, 7.5" x 7.5", 270 gsm (Extra Heavyweight), White Paper, Smooth Surface, EXTRA HEAVYWEIGHT PAPER: Stands up to advanced.., By Brand Stillman Birn - Walmart.com
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Amazon.com: Stillman & Birn Beta Series Hardbound Sketchbook, 5.5" x 8.5", 270 GSM (Extra Heavyweight), White Paper, Cold Press Surface : Arts, Crafts & Sewing