A virtual pdf printer will not physically print the pdf onto paper. It will create a pdf that you can save. You can then open it with whatever pdf reader you use and then print from there to get a physical copy to cut and assemble.
Inkscape has a choice to save the page as a pdf. You need to make sure the page you opened in Inkscape is at the scale you want. I do not use Inkscaple a lot so do not know where in Inkscape there is a feature to change the percentage or if there is in fact that feature available in Inkscape.
In that example I posted there is a feature in Adobe Reader XI where you can choose a percentage that you want to print the pdf page(s). I have CutePDF Writer as a choice in the printers list available so can save the output as a pdf. Just have to make sure the parts all fit on the page size chosen. I have a large format printer and can print up to 13 inches/ 33 cm in width so I can adjust the output of CutePDF Writer to use large sheets of paper.
