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Hi, I appreciate the fast response, I am still a bit confused! Let me show an example of my deal.

I found this poster, [ATTACH]53216[/ATTACH], from there shop, "Each print uses archival pigment inks on a 140 lb - 300g archival and acid free Aquarell Matte Paper." 300g refers to 300 resolution if i am correct. I did some research and found that they simply used this image, [ATTACH]53217[/ATTACH], which is 600x600. I created a new photoshop file, 11x17 300 pixel/inch, and resized the last image to very similar proportions of the first posted poster, this is what i got, [ATTACH]53218[/ATTACH](left is fit to screen, right is 100%) assume I printed this image would the quality be as bad as it is at 100% (using the ruler it shows 3 inches per 1 inch, when i make it a 1:1 ratio, 11x17, its slightly better) if so, how do i avoid this to create something similar to the originaly posted picture? Do you think theirs looks as nice as the image or will theirs be a loq quality final product?

Thank you for your quick response!