What's the Minimum Image Resolution for a Google Ads Responsive Display Ad?

Google requires a minimum resolution of 600 x 314 pixels for a landscape image, 300 x 300 pixels for a square image, and 600 x 1067 pixels for a vertical image in a Google Ads responsive display ad, per Google Ads Help's responsive display ad specifications.

Three Aspect Ratios, Three Different Floors

Responsive display ads let an advertiser upload up to 15 images across three aspect ratios, and Google enforces a separate minimum resolution for each:

• Landscape (1.91:1) — minimum 600 x 314 pixels, recommended 1200 x 628 pixels.
• Square (1:1) — minimum 300 x 300 pixels, recommended 1200 x 1200 pixels.
• Vertical (9:16) — minimum 600 x 1067 pixels, no separate recommended size published beyond meeting the minimum ratio and resolution.

Images that fall below these minimums are rejected at upload, regardless of file size — a technically small file that's also under-resolution won't be approved just because it's within the separate file size cap.

File Size Is a Different Limit From Resolution

Resolution and file size are tracked separately in responsive display ads. Every image, at any of the three aspect ratios, can go up to 5,120KB (5MB) in file size. An image can be well above the minimum resolution and still get rejected if the file itself exceeds 5,120KB, so clearing the pixel-dimension floor doesn't guarantee the upload succeeds.

Logos Follow Their Own Minimums

If the ad includes a logo asset, Google applies yet another set of resolution floors: a minimum of 128 x 128 pixels for a square (1:1) logo, and 512 x 128 pixels for a landscape (4:1) logo. These are separate from the main image requirements and get checked independently during upload.

Why This Format Uses Minimums Instead of Fixed Sizes

Unlike the old uploaded static image ad format — which requires one finished creative at an exact size — responsive display ads are assembled automatically by Google from whichever combination of headlines, images, and logos performs best for a given placement. Setting a minimum resolution rather than a single fixed size lets Google's system crop, resize, and recombine assets across the enormous range of ad slot dimensions on the Display Network, while still guaranteeing the source image has enough detail to hold up after resizing.

Practical Upload Tips

• Shoot or source images above the recommended sizes (1200 x 628 landscape, 1200 x 1200 square) rather than at the bare minimum, since Google's automated cropping performs better with extra resolution to work from.
• Check both resolution and file size before upload — an image can fail for either reason independently, and the error message doesn't always make clear which limit was missed.
• Keep logos simple and high-contrast, since the 128 x 128 minimum logo size leaves little room for fine detail to render clearly at small sizes.

Bottom Line

Supply responsive display ad images at or above Google's recommended 1200 x 628 (landscape) and 1200 x 1200 (square) sizes rather than the bare 600 x 314 and 300 x 300 minimums, so the automated cropping and resizing has enough resolution to work with.

Source: Google Ads Help, "Create a responsive display ad" and "Best practices guide for responsive display ads" (support.google.com/google-ads/answer/7005917 and support.google.com/google-ads/answer/9823397).