Help System > Image trimming information
Here's the TL;DR:
Let's say that you took this picture of the Arkansas State Capitol, and you want us to print it. Do you see a problem with the photo?
Notice the very top of the building: it's right on the edge of the picture. This presents any printer with a problem:
When any printing company prints something that's going to extend to the edge of the page, they print it on a piece of paper that's larger than the final print size, and then trim it down to the final print size.
This requires them to print the picture a little bigger than the print size (maybe by about 1/8 to 1/16 of an inch), and then trim it down to size.
The result of this would cause a problem with the above image: after trimming, here's what the top of the picture would probably look like. Uh-oh! The top of the building is cut off:
There's no way to avoid approximately 1/16" to 1/8" of the edges of your print being trimmed off (unless you order a print with a border).
This doesn't mean that your printed page will be 1/8" smaller than the print size you asked for; it means that a thin border of the edge of your print won't be printed.
Always make sure there's nothing important in the 1/8" border on the edge of images you want printed.
Here would have been a better image to send to us. Notice that there's plenty of room along the top edge for trimming:
(The very bottom right of the building may be cut off a little after printing, but that's not nearly as visually significant as cutting off the top of the Capitol dome.)
Just keep in mind that a thin border of your image will be trimmed off when printing, and you'll be happy with what you get from us!