Universal Wirebound Memo Books, Top Bound, Narrow Rule, 5 x 3, 50 Sheets, 12/Pack – UNV20435. Durable, flexible cover and white paper for quick notes and memos. Single-coil binding makes the book easy to open and close. Pad Type: Memo; Sheet Size: 3 x 5 inch; Ruling: Narrow; Number of Sheets per Pad: 50.