Set of two Rhodia Classic Top Spiralbound No. 13 Notepad (4 by 6 inches) has a double wire binding at the top that won't snag or unwind, plus 80 g acid-free, pH neutral paper with a smooth, satin finish - very ink-friendly. All 80 sheets of this A6-sized notepad are micro-perforated at the top for easy and clean tearing, so you can jot down a note, share ideas, and keep your thoughts at hand. Rhodia Notepads are a favorite with architects, designers and scientists.