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About product and suppliers:
        Alibaba.com offers 336,135 a4 products. About 3% of these are copy paper, 1% are cash register paper. 

A wide variety of a4 options are available to you, such as a4, a3. You can also choose from white, colored. As well as from free samples, paid samples. 

There are 333,665 a4 suppliers, mainly located in Asia. The top supplying countries are China (Mainland), Thailand, and Taiwan, which supply 96%, 1%, and 1% of a4 respectively. 

A4 products are most popular in North America, Western Europe, and Domestic Market. 

You can ensure product safety by selecting from certified suppliers, including 58,642 with ISO9001, 42,966 with Other, and 13,292 with ISO14001 certification.