Boorum & Pease BOR1602121512 Bound columnar book, 12-column, 2-page form, 150 pages, 12-1/4 x 10-1/8 Extra-Durable Bookstyle Bound Columnar Books, 12-1/4 x 10-1/8. 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. Thread-sewn for durability and a flatter writing surface at binding margin. Permanent, waterproof inks. Unit ruled. Table of Contents page. Extra-Durable Bookstyle Bound Columnar Books, 12-1/4 x 10-1/8.