New to the Delfonics range is this medium-sized version of the classic Rollbahn Notebook. The grid ruling (5mm x 5mm) makes this the perfect design notebook and writing notebook. The Delfonics spiral-bound notebook is extremely well made. The cover is robust and splash-proof. The grid-ruled notebook uses high-quality, fountain-pen-friendly paper and each page is perforated for clean removal. It's a handy-sized notebook that has an elastic closure strap in navy and five plastic pockets to hold loose pieces of paper. The Delfonics Rollbahn is only available in Japan and Australia and is otherwise very hard to find.