<Tr> <Th_colspan="2"> Measurement </Th> <Th> Cup size </Th> </Tr> <Tr> <Th> inch </Th> <Th> cm </Th> </Tr> <Tr> <Td> 7.0 </Td> <Td> 17.8 </Td> <Td> </Td> </Tr> <Tr> <Td> 7.5 </Td> <Td> 19.1 </Td> <Td> </Td> </Tr>

What does a double d bra size mean