O-Check Design is a South Korean company that produces calendars, notebooks, writing paper and other stationery products that have a fairly unconventional appearance. The products are very subtly designed using paper and cardboard that has earthy tones. which are simply but beautifully bound. This notebook with its spiral binding and 160 pages provides enough space for all your notes, sketches and ideas. The inner book is plain and simple but more than fulfils its purpose. The first 40 sheets are broad-format ruled and measure 182 x 257 mm. The remaining 40 sheets are blank and therefore great for making sketches and other types of drawings (Manga anyone?). This spiral notebook is not only distinguished by its subtle design but also protects the paper sheets from bending or folding and makes writing or drawing in it that much easier because of its solid cardboard cover. The two separate spiral bindings that do not run across the entire length of the cover are a particularly nice design touch!