Boorum & Pease® Log Books are constructed with Smyth-sewn binding for a superior, tamper-evident page that lies flat as you write. 8-1/8″ x 10-3/8″. Record-ruled 8-1/8″ x 10-3/8″ log book provides 37 lines per page, 150 numbered pages, numbered lines and columns and a table of contents on premium, acid-free paper.