In 20001year, the General Standard for Layout of Primary and Secondary School Textbooks issued by the General Administration of Quality Supervision, Inspection and Quarantine proposed that the basic layout font size of primary and secondary school textbooks, which has been popular for many years, should be upgraded from 16 to 16.
The standard size of high school textbooks is 16, that is, 2 1cm*29.7cm, which is generally smaller than it, but not larger than it. It's better to have a bigger schoolbag, which is looser. The smaller primary school math book should be 32 kais, which is b5.
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According to the size, folio is usually divided into three types: large format, medium format and small format. For 787× 1092 paper, 12 is a large format, 16 ~ 36 is a medium format, and 40 is a small format. But books with characters are generally in medium format, such as high school textbooks.
Folio shapes are rectangles with different proportions except 6 quarts, 12 quarts, 20 quarts, 24 quarts and 40 quarts, which are suitable for books with different properties and uses. For example, high school textbooks are generally 16 quart rectangles.
In the past, the size of paper was expressed by the number of "open" (for example, 8 open or 16 open, etc. ). At present, China adopts international standards, which stipulate that the format and specifications of paper should be expressed by A0, A 1, A2, B 1, B2 and other marks. According to the standard, the proportional relationship between the width (represented by X) and the length (represented by Y) of paper is X: Y =1:N. ..