Delfonics Rollbahn Spiral Cap-Martin Notebooks feature an outside cover with a cloth-like texture and a logo in glossy black foil. The logo matches the unique black metal spiral binding which is a similar design to the Rollbahn Classic spiral notebooks. The inside cover is lined in brown paper. The notebooks have an elastic strap to ensure closure and a thick cover that makes it easy to write on. The sheets are high-grade paper that have a 5mm grid design and are fountain pen friendly that makes it easy for perforation and clean removal. All the notebooks contain five plastic pockets to hold loose pieces of paper. Delfonics is one of Japan's most respected stationers whose products are highly sought after. Like many aspects of Japanese culture, Delfonics' products reflect attention to detail and design individuality. These come in two different sizes: B6 Large (5-1/2 in. x 7 in. 140 pages ) and A5 (6-1/2 in. x 8-1/2 in. 160 pages). Ideal for bullet journaling.