Boorum & Pease Bound Columnar Book, 2-column, 1 Page Form, 150 Pages, 10-3/8 x 8-1/8 (21-150-2) Extra-Durable Bookstyle Bound Columnar Books, 10-3/8 x 8-1/8. Thread-sewn for durability and a flatter writing surface at binding margin. Permanent, waterproof inks. Thread-sewn for durability and a flatter writing surface at binding margin. Permanent, waterproof inks. Unit ruled. Table of Contents page.