How do I get a photo to print out the exact size I have set up in Adobe Bridge?

Hi, I have a canon MP480. I want to print out some photos the exact size I have them set up in Adobe Bridge (4x6 by 6.7).  I can't seem to do that using the photo software that came with my printer (Easty-Photoprint EX). It asks for paper size.  If I try to print them on the next size up from 4 x 6 it prints larger than I want.  So how can I tell the software to print them out to the size i want?  Thank you.Joyce Keay