LASTS ALL YEAR. GUARANTEED!* This Five Star 1 Subject Notebook has 100 double-sided, graph ruled sheets that fight ink bleed and are perforated for easy tear out. 4 squares per inch, ideal for graphing, charts, and engineering projects. Sheets measure 8 1/2" x 11" when torn out. Tough pockets help prevent tears and hold 8 1/2" x 11" loose sheets. The covers are water resistant to protect your notes all year. Spiral Lock wire helps prevent snags on clothes and backpacks. Made with SFI certified paper. Notebook is recyclable ? just remove the reinforcement tape on the pocket and recycle the rest! 6 pack available in Amethyst Purple, Sedona Orange, Seaglass Green, Tidewater Blue, Gray and Black. *Guarantee is valid for one year from purchase date. Does not cover misuse.