!! pixel ¿ô ·×»»¼° N x dip / 25.4 = Pixel ! A4 A4 = 297mm x 210mm ,dpi,size, ,72 dpi,842px x 595px, ,300dpi,3508px x 2480px, ,600dpi,7016px x 4961px, ,1200dpi, http://www.size-info.com/pixel/