B5

The B5 paper size is part of the ISO B series used for printing, technical drawings, and stationery. With dimensions of 176 x 250 mm, B5 offers a versatile bridge between office use and large-format technical documents. It maintains the distinctive height-to-width ratio of 1:√2 (approximately 1:1.4142) that enables efficient scaling across the B system sizes.

With a surface area of 0.04 square meters, B5 provides a practical balance of printing space and portability. Its medium size makes B5 suitable for notebooks, charts, graphs, posters, and informational handouts requiring manageable dimensions. The origins of B5 date back to the German DIN 476 standard from 1922 before being adopted as an ISO standard in 1975. Today, B5 is commonly used in offices, schools, stations, and technical fields for memos, reports, plans, and general printing needs. Its flexibility between office and large-format use establishes B5's broad utility.