QPrinter::paperSize() gives wrong data

When Label Printer is used QPrinter::paperSize(QPrinter::Millimeter); returns wrong data. If Dymo LabelPrinter 400 is used for the "label 99012" paper size gives to 27.8 and 88.6 mm where as the original size reported by drivers is 35.7 and 88.6 mm if we check via Windows/printer and device/ Printserver properties.

On some machine it gives even more bizarre value 297.0mm x 210.0mm.

It can be easily reproduce with this printer driver:
Dymo LabelPrinter 400 driver from

http://download.dymo.com/dymo/Software/Download%20Drivers/LabelWriter/Downloads/1/LabelWriterDrivers-x64.msi