--- title: "Mailchimp image size and specs (2026) | Herofab" description: "Mailchimp email image sizes: 660–1,320 pixels wide in the new builder, 600–1,200 in the legacy builder, PNG, JPG or GIF, 1 MB maximum recommended." url: https://herofab.app/guides/mailchimp-email-image-size language: en updated: 2026-10-12 --- # Mailchimp image specs Mailchimp email image sizes: 660–1,320 pixels wide in the new builder, 600–1,200 in the legacy builder, PNG, JPG or GIF, 1 MB maximum recommended. ![Black-dial watch with a mesh strap on white, three-quarter view](https://herofab.app/img/ex/watch-packshot-1100.webp) Made with Herofab · Packshot studio ## All Mailchimp image requirements Source: [Mailchimp Help — Image Recommendations for Content Blocks; Use the Content Studio; Troubleshooting Images in Emails; Use Image Content Blocks in the New Builder; Upload, Add, and Edit Images in Emails and Landing Pages](https://mailchimp.com/help/image-requirements-for-templates/). Checked 12 October 2026. [Read again · 12 October 2026](https://herofab.app/guides/marketplace-image-rule-changes) - **Recommended:** Images 660–1,320 pixels wide in the new builder and 600–1,200 pixels wide in the legacy builder; Mailchimp resizes an image to fit the content block it is added to - **Template width:** Templates in the new builder are 660 pixels wide and legacy email templates are 600 pixels wide - **File size:** A maximum of 1 MB per image is recommended; the content studio takes uploads of images up to 1 MB each and other file types up to 10 MB each - **Formats:** PNG, JPG or GIF, with PNG to maintain transparency; the content studio supports JPG, JPE, JPEG, GIF, PNG and BMP image files - **Column widths:** Recommended minimum image widths in the new builder are 660 pixels for full-width sections, 330 for 2 columns, 220 for 3 columns and 165 for 4 columns; in the legacy builder 564, 264, 164 and 132 pixels - **Retina displays:** In the new builder a minimum of 660 pixels is recommended, doubled to a minimum of 1,320 pixels for images to look good on retina displays - **Colour mode:** RGB colour mode or profile; CMYK doesn't render accurately online and can break an embedded image - **Resolution:** 72 DPI is generally enough for the web, but isn't required - **Logo:** In the legacy builder default logo blocks match the dimensions of an Image content block, with a recommended minimum image width of 564 pixels - **Landing pages:** For a landing page set to 100% width, images between 1,500 and 2,500 pixels wide are recommended; images larger than 2,500 pixels may not be resized properly [Check your images — free](https://herofab.app/tools/image-size-checker) ## What Mailchimp asks for, covered. Mailchimp recommends images 660 to 1,320 pixels wide in its new builder and files of 1 MB or less. Herofab's square 2K output is 2,048 pixels wide and heavier than 1 MB, so it has to be resized and compressed before upload; the JPG download is the lighter file. For a full-width landing page Mailchimp recommends 1,500 to 2,500 pixels, and a 2,048-pixel image is inside that range. ### Resize for email Square 2K output is 2,048 pixels wide, above the 1,320 pixels Mailchimp recommends for retina displays. ### Under 1 MB The content studio takes images up to 1 MB; a 2K file is heavier and has to be compressed. ### Inside the landing page range A 2,048-pixel image is inside the 1,500 to 2,500 pixels recommended for a full-width landing page. [Start free](https://app.herofab.app/login?lang=en) ## Mailchimp, answered. **What image size is right for Mailchimp?** Mailchimp email image sizes: 660–1,320 pixels wide in the new builder, 600–1,200 in the legacy builder, PNG, JPG or GIF, 1 MB maximum recommended. **How large can an image file be for Mailchimp?** A maximum of 1 MB per image is recommended; the content studio takes uploads of images up to 1 MB each and other file types up to 10 MB each. Source: Mailchimp Help — Image Recommendations for Content Blocks; Use the Content Studio; Troubleshooting Images in Emails; Use Image Content Blocks in the New Builder; Upload, Add, and Edit Images in Emails and Landing Pages, checked 12 October 2026. **Which image formats can be used for Mailchimp?** PNG, JPG or GIF, with PNG to maintain transparency; the content studio supports JPG, JPE, JPEG, GIF, PNG and BMP image files. Source: Mailchimp Help — Image Recommendations for Content Blocks; Use the Content Studio; Troubleshooting Images in Emails; Use Image Content Blocks in the New Builder; Upload, Add, and Edit Images in Emails and Landing Pages, checked 12 October 2026. **Can I check my images before uploading?** Yes. The free [image size checker](https://herofab.app/tools/image-size-checker) reads each file in your browser and tests it against these rules; the image is not uploaded. **Where do these figures come from?** From Mailchimp Help — Image Recommendations for Content Blocks; Use the Content Studio; Troubleshooting Images in Emails; Use Image Content Blocks in the New Builder; Upload, Add, and Edit Images in Emails and Landing Pages, read on 12 October 2026. Platforms update their specs; the [official page](https://mailchimp.com/help/image-requirements-for-templates/) is the final reference. 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