16 paper was first used in documents in government and institutions, but later, due to the popularization and development of A4 paper, 16K paper gradually faded out of the market. 16K paper used in school personnel files is generally18.5× 26cm..

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Now the general standard: industry standard GB/T 1999 is implemented nationwide. The current format size of books and periodicals is mainly series A, which has the following types: A4 (16k) 297mm * 210mm; A5(32k)2 10mm* 148mm; There are three types of A6 (64k)144mm *105mm, of which A3(8k) has not been determined, but 420mm*297mm is commonly used. A2(4k)420mm*594mm。