BookFactory Economy Blue Lab Notebook - 168 Pages (Ruled Format), 8 7/8" x 11 1/4", Flexible Blue Cover Laboratory Notebook (E-LIRPE-168-LLR-A-LBT1) This book has all the features of our professional grade series, but with a flexible cover. Same cover material as professional grade books, Smyth sewn binding -- book lies flat when open Tamper-evident, archival quality, acid-free paper in 1/4" (6 mm) ruled format Page Dimensions: 8 7/8 x 11  (22.5cm x 28.6cm) Features a User Data page, a Documentation Guidelines page, and a Table of Contents page