<P> Although the movement is towards the international standard metric paper sizes, on the way there from the traditional ones there has been at least one new size just a little larger than that used internationally . </P> <P> British architects and industrial designers once used a size called "Antiquarian", 31 in × 53 in (787 mm × 1,346 mm), as listed above, but given in the New Metric Handbook (Tutt & Adler 1981) as 813 mm × 1,372 mm (32 in × 54 in) for board size . This is a little larger than ISO A0, 841 mm × 1189 mm . So for a short time, a size called A0a of 1,000 mm × 1,370 mm (39.4 in × 53.9 in) was used in Britain, which is actually just a slightly shorter version of ISO B0 at 1414 mm . </P> <Table> Colombian metric paper sizes <Tr> <Th> Size </Th> <Th> mm × mm </Th> <Th> aspect ratio </Th> </Tr> <Tr> <Th> ​ ⁄ pliego </Th> <Td> 250 × 350 </Td> <Td> 1.4 </Td> </Tr> <Tr> <Th> ​ ⁄ pliego </Th> <Td> 350 × 500 </Td> <Td> 1.412857 </Td> </Tr> <Tr> <Th> ​ ⁄ pliego </Th> <Td> 500 × 700 </Td> <Td> 1.4 </Td> </Tr> <Tr> <Th> Pliego </Th> <Td> 700 × 1000 </Td> <Td> 1.412857 </Td> </Tr> </Table> <Tr> <Th> Size </Th> <Th> mm × mm </Th> <Th> aspect ratio </Th> </Tr>

What is the actual size of a1 paper