The 48K Notebook is a specialized, compact format that is highly popular for its incredible portability. Measuring approximately 95 x 175 mm (3.7 x 6.9 inches), it is noticeably slimmer than a standard A5 but slightly larger than a pocket A6. This unique “Tall & Slim” profile makes it the perfect fit for breast pockets, back pockets, or the side compartments of small bags.