Paper size conversion: International versus Chinese kaiben (开本)

In China printers use special terminology for paper size, based on divisions of the largest sheet of paper. So for example if you divided the paper in four, the paper size for your publication would be called 4 kai (四开). This system is complicated by the fact there is no official, universal paper size, so if someone says 8 kai or 16 kai it’s a rough guide – you must confirm with your printer the specifics. However, as a rule of thumb you can check on the following to get a rough idea of the equivalent international paper size:

Chinese term Approximate international
paper size equivalent

正度787 x 1092mm

大度 889 x 1194mm


841 x 1189mm


正度546 x 787mm

大度 597 x 889mm


594 × 841mm

四开本(4张) 4 kai

正度389 x 546mm

大度 444 x 597mm


420 x 594mm

六开本 6 kai

正度370 x 520mm

大度 285 x 420mm


297 x 420mm

八开本 8 kai

正度260 x 370mm  270 x 390mm

大度 258 x 420mm  295 x 440mm

大8开本 262 x 374mm

小8开本 260 x 368mm


297 x 420mm

十六开本 16 kai

正度185 x 260mm

大度 210 x 285mm

大16开本 187 x 262mm

小16开本 184 x 260mm


210 x 297mm

三十二开本 32 kai

正度185 x 130mm

大度 142 x 210mm

大32开本 140 x 203mm

小32开本 130 x 184mm


148 x 210mm

64开本 64 kai

大64开本 101 x 131mm  99 x 130mm

小64开本 95 x 127mm  92 x 125 mm


105 x 148mm


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