I would add one note to this from personal experience, regarding how designs look on the computer versus in the "flesh" (so to speak). This might be helpful for people to keep in mind when working on designs with their computers.

I ordered a kilt in the Galician tartan from Scotweb for obvious personal reasons. I did so despite the fact that I was not crazy about the tartan from the images of it.

When I got the completed kilt, it was beautiful! The small images available had not done the tartan justice.