If you do email campaigning, keep file sizes small while still managing to create an appealing presentation. You want to include all necessary media that both provides information and allure without overwhelming system transfers.

The design of an email impacts whether your campaign gets delivered. The design also defines if the targets bother reading the email, let alone clicks through.

What follows answers the question of what size should your emails be. It’s an ideal guide to image width, sizes, and the principles for putting together an email campaign.

Standard eMail Template Dimensions

Template Dimension	Typical Dimension	Recommended	Options
Width	640 px	600 px	Up to 750 (experimert and test)
Height	Up to 3,000 px	Include important details in the first 350 px	Use what makes sense
Header height	Up to 300 px	Up to 150–200 px	Whatever you do, keep it user- and mobile-friendly
Size (general)		Up to 102 KB

Template Dimensions

What you want is to unify the standards of your emails so that they display across all channels, i.e., clients and devices. Factor in what email targets use. There’s Gmail, iPhone email, Yahoo, and Outlook. There are still some using AOL.

The best way to accomplish this is for your emails to be responsive. You can get predefined templates for your email engineered to ensure all your targets are in the bullseye.

Design Width

You’ve probably heard the standard is 600 pixels for emails. It’s been a rule of thumb for some time and is unlikely to change any time soon. Gmail reportedly won’t display background colors in a template over 640 pixels in width. Many email services and builders use the default 600 pixels.

Some templates are over 700 pixels wide. Test those across all the popular email platforms before implementing them.

eMail Height

There is no required size for height. But here are things to pay attention to when building a campaign with a template.

Put important info above the fold. That’s within the first 350 pixels. Use space wisely. Photos have to be informative as well as beautiful. And keep emails uncomplicated. Short messages encourage a higher probability of reading to the end. Too much content and the reader may blur your point.

Transactional vs. Marketing eMail

Transactional emails tend to lean on the short side. Transactional emails provide instruction, notify users, or confirm an action. You can add a little marketing material, but the execution is relatively simple.

Marketing emails promote services and goods. The emails share knowledge, build trust, and promote brand and loyalty. These emails can be around 5,000 pixels while transactionals stay under 1,500.

Other Considerations

Let’s cover inner blocks and content. eMails have three main sections: Header, Content Blocks, and Footers.

Header Sizes

Headers can contain several elements, including the company’s logo, links to relevant information, and a set of buttons for your menu. The set-up can be a hefty pixel eater if you’re not careful. A concise design will only take up about 200 pixels. Keep in mind that number’s part of the recommended 350 pixels above the fold.

Content Blocks

With no general rules regarding your content, you have room for creativity. Your content includes text, videos, images, GIFs, dividers, and buttons. What you want to manage is an overall comprehensive narrative within visual appeal and a clear CTA.

Size of Images

Here are some things to keep in mind concerning image size.

• Templates and email services will have limits for image sizes to help save server space.
• Putting your images on a server and linking them to your emails do not impact email size.
• The minimum recommended res is 72 dpi though there’s no hard or fast rule.
• You want to optimize retina displays. Use two times the size.

Footer Size

Footers can include legal details like the business address, notes, unsubscribe links, and more. The information is often overlooked, which is likely why, in general, there are no suggestions for the footer’s height.

One trend in email marketing is the desire to create the look of a website. Bold images, header hierarchy, video, and more. You can push the boundaries but stay within the parameters of smart campaigning.