What size should the images be in my email signature?

File Size and Format:

• File Size:
  • Keep individual image sizes under 200 KB to ensure quick loading and prevent being flagged as spam.
  • For social icons or small graphics, aim for <10 KB per image.
• File Format:
  • Use PNG for sharp images, logos, or transparent backgrounds.
  • Use JPEG for photos to balance quality and file size.
  • Avoid GIFs unless you’re using subtle, professional animations.

Best Practices:

1. Use Web-Optimized Images:
   • Compress images before uploading to reduce file size without losing quality (e.g., using tools like TinyPNG or ImageOptim).
2. Use Absolute URLs:
   • Host images on a secure server (e.g., https://) and use the hosted links in your email signature.
3. Use Inline Styles for Responsiveness:
   • Add inline width and height attributes (e.g., <img src="..." width="100" height="30">) to ensure the image scales properly.
4. Test Your Signature:
   • Test how your email signature appears in major email clients (e.g., Gmail, Outlook, Apple Mail) and on mobile devices.

Don't forget about Retina Displays

• Make your email signature images retina by uploading them at double the size and reducing the size by half in your HTML code.
• If you're an Email Signature Rescue user, just tick the Retina box when uploading.

By following these guidelines, your email signature images will look professional, load quickly, and work well across different platforms.