Page size/image size/print size?

[Owen]

I have some line art images that are going to be used in a book. The publishers have asked me to suppy them at the size they are to be printed, and at 1200dpi.

The page size is 9 x 6 inches, the images will be about 3 x 4.5in on the pages. I have page size set in Xara and images drawn, but when I check print size (in PS) images reduce in size from that drawn in Xara (export drawing). What's up?

Can someone kindly help me ensure that what I see on-screen and export at 1200dpi will print at required size.

I assume this has nothing to do with screen dpi, otherwise I would be doing some homework instead of asking such a basic question. Sorry if I got that wrong!

Much thanks,
Owen.