
Technical Drawing Standards: Paper Sizes
The British (BS) and International (ISO) Standards give us a range of standard paper sizes to choose from. The range is know as the 'A' Size Largest commonly used size is A0 which is a piece of paper 1m² in area with the sides in proportion 1:√2 (≈ 1:).. A1 is half this size, A2 is half that, A3 is half again and A4 is half that.