Want to make your images look sharp while keeping file sizes to a minimum? Here's the information you need:

If you want a custom header to appear at the top of your newsletter issues, use these dimensions for best results:


Width: 1080px (to provide retina quality)
Height: Any height you prefer

Big feature image:

For large images in the body of your newsletter issue, use these dimensions for best results:


Width: 600px (we'll always scale wider images down to this width)
Height: Any height you prefer

NB. While we scale images down to the full width of the newsletter, we do not convert them to lower-resolution images. So, for example, a 1200px-wide image will display as sharper than a 600px-wide image if you select the "original size" icon in the menu next to the image (see screenshot below).

Smaller image:

If you want to use an image that's narrower than the full width of the newsletter, set the width to fewer than 600px. Eg. if you wanted it to be half the width of your newsletter, you would set it to 300px.

When you upload your image, the editor will automatically stretch it to the full width of the newsletter. Click on the 3 dots next to the image, select the icon for "original size", and the image will be centered on the page and shrunk to the size you intended:


File formats:

For all images, we would recommend using JPG as the file format as it makes sure the image sizes do not get out of hand. Using big size images can potentially harm the deliverability of your email due to some email clients rejecting it, so keep this in mind when uploading graphics!

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