Dimensions: Varies. The biggest possible image you can upload is 2000px wide by 1200px high.
File Size: 1mb or less
While images should be kept as small as possible, the background options allow for images to be aligned a number of ways.
Note: Background images can repeat left to right, top to bottom, or in both directions. They can also just be a single image, aligned left, right or center.
We don't recommend using the full size for both dimensions.