Try compensating the size by pixels instead of inches. As you know, PEP calculates the engraving size based on the Pixel Resolution setting (step over), so calculate the pixel width & height based on that. Example: if you want it 1" X 1" and the Pixel Resolution setting is .01", the Pixel size should be 100W X 100H. Also, since your image is real small, don't rely on the dithering outcome how it views on a large monitor.