Signature Design General Guidelines
Jan Moravec avatar
Written by Jan Moravec
Updated over a week ago

There are very few limits on what you can do with your signatures. The points below are good practices to ensure your signature looks professional and consistent across different platforms, devices, and email apps. Don't be afraid to contact us via chat or email to ask for consultation and help!

Signature size

Gmail (as well as most email clients) doesn't support responsive signatures. That makes it harder for you to control how will the signatures be adapted for smaller screens.

To prevent most problems, we recommend a maximum width of 650 pixels for the whole signature.

That means you might need to organize your signature more vertically. But don't go overboard, oftentimes less is more, and overloading your signature with data will effectively convey less information to email recipients.

Layout & Design

If you check out the predefined templates, you will notice that the content is organized in tables.

While not necessary, doing so gives the designers broader options to organize the signature content and even more importantly, keep it consistent across different email clients.

Even if you don't want to code the signature, you can add a table in the editor from the top ribbon and add or remove cells, adjust its size, etc. upon right-clicking it.

You can also use the predefined template and just tweak them to fit your needs!

Images & Fonts & Media

The maximum allowed file-size for image uploads is 600 kB. If you want to use a bigger image, you would need to host it elsewhere. But we strongly recommend against using massive images for several reasons, mainly because it can slow down the load times of your messages, create problems in some email clients, and is just overall unnecessary.

If you have high-quality images, don't be afraid to compress and scale them down appropriately. The recommended size in pixels is exactly 2x or 4x the displayed dimensions. So if you will display the logo in signatures at 100*100 pixels, the best dimensions for the uploaded file would be 200*200 pixels or 400*400 pixels.

Recommended formats are JPG, JPEG, PNG, GIF (with some exceptions). If you have transparent versions, it will certainly help with Dark Mode Ready signatures.

Gmail doesn't support methods for importing or linking fonts from external sources; it strips header styles, and there's no way to inline custom font declarations. Email has so many more constraints than the web because of the many different ways the HTML is consumed and altered by clients. The best way to ensure consistency is to use web-safe fonts.

You can still somewhat utilize other fonts, although be prepared that your preferred version will be displayed only to those that have those specific fonts available on their device. You can learn more here.

Deliverability & Spam

Some of the most common problems with emails are related to deliverability issues. It's always better to prevent these issues than solve them and adhering to a couple of rules with designing the signatures will prove extremely helpful.

Don't forget to set alt text for images, stay away from using URL shorteners, (if possible) don't use tracking tools for your emails, etc. More details and advice can be found in the article dedicated to this issue.

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