The 5.5" x 8.8" Karst Daily Journal Bundle Set are tree-free A5 journals made from high-quality, sustainable, recyclable stone paper. This set of two includes lined and blank pages to engage the curiosities of your left and right brain. Their unique, eco-friendly material is acid-free, bright white, and waterproof, with a premium look and feel. 50 sheets of lined and blank stone paper which holds a C2C Cradle to Cradle Silver Certification. That means if you do have to dispose of your Karst notebook; it is recyclable. Through a partnership with 1% For The Planet, one percent of sales of all EcoSmart® products will be donated to environmental nonprofits.