<Tr> <Th> Name </Th> <Th> mm × mm </Th> <Th> Ratio </Th> </Tr> <Tr> <Th> PA0 </Th> <Td> 840 × 1120 </Td> <Td> 3: 4 </Td> </Tr> <Tr> <Th> PA1 </Th> <Td> 560 × 840 </Td> <Td> 2: 3 </Td> </Tr> <Tr> <Th> PA2 </Th> <Td> 420 × 560 </Td> <Td> 3: 4 </Td> </Tr>

Length of a4 piece of paper in cm