I think that the problem was the resolution of my image, the dimension is 19 x 22 cm. If I use 96 pixels/inch of resolution the image is printed with the same size of original scanned image. In case of different resolutions, the image is printed in a different size.
The resolution of an image don't affect the size in cm, but affects the print size.
If I'm wrong, please help me. Living and learning!

Emerson Santon Reed
emerson@folhamatic.com.br