Charts are three-hole punched to fit standard easels. Features a standard 25 pt. back cover. Everyday-weight 15-lb white sheets are perforated for a clean tear-out. Book/Pad Binding Type: Taped Book/Pad Binding Edge: Top Book/Pad Sheet Size: 27 x 34 Book/Pad Subjects/Sections: 1. Green : Paper contains 50% post-consumer recycled content, 100% total recycled content.