404 Image size guidelines
What size should images be?
While there are no set image size specifications, a good rule of thumb is for image size to be as close as it will appear on the page as possible. For example, do not upload an image that is 2500 pixels wide if it will be displayed at a 600 pixel width on a page. Instead, size your image to be as close to 600 pixels wide as possible. This will improve page load times.
When sizing images, keep mobile device usage in mind. If an image will be displayed at full width on a mobile device, it should be at least 320 pixels wide.
Header images
Header images that will be displayed at full width across the top of a page should be at least 1800 pixels wide. There is not a set height specification for header images.
Image size suggestions
The following are suggestions for image sizes, depending on the section layout configurations you have selected for your page. Keep in mind that these are only suggestions, and column widths will vary based on browser and device size.
One column full-width
Approximately 1200 pixels wide
Two equal columns
Approximately 600 pixels wide
Two columns
Large column: approximately 800 pixels wide
Small column: approximately 400 pixels wide
Three equal columns
Approximately 400 pixels wide
Four columns
Approximately 300 pixels wide
