Nailing the fundamentals and delivering them with a minimalist sense of style, it's no wonder that the Delfonics Rollbahn Slim A5 Notebook is an evergreen favourite for Milligram staff. This simple, slim A5 format with a grid ruling (5mm x 5mm) gives you plenty of room to write, think and sketch, and is slim enough to slip into your bag so you can work wherever you go.