fonts sizes

When I import a file from Word or Open Office the fonts are not the same size. MY Atrial fonts that are 12 in Open Office or Word show up as a very small unreadable font. When I change the size from 12 I have to make it 50 to look the same as it was in the other programs. How do I fix this so the imported text is the same size?

Have you checked that zoom factor is set to 100%? See View>Zoom