What are the Cross-channel ad requirements?

Last updated: October 7, 2026

Use this checklist when you prepare images and text for a Cross-channel ad. Assets that don't meet these requirements can't be saved, or may be disapproved by Google.

Images

  • Up to 14 images per ad

  • File types: .png, .jpeg, .jpg

  • File size: less than 5MB

  • Ratios: landscape 1.91:1 and square 1:1, 1200x628px and above

  • We recommend 12 landscape and 2 square images. When you upload an image, you can use it as landscape, square or both, so you don't need to prepare square versions separately.

  • Avoid text on images: Google may disapprove the ad.

Text

Field

How many

Max characters

Rules

Headline

Up to 5 (at least 1)

30

No exclamation marks, no emojis

Description

Up to 5

80

Max one exclamation mark, no emojis

Business name

1

25

Applies to this ad only

Button URL

1

1800

N.Rich adds UTM parameters automatically

Call to action

Choose one language and one button text from the dropdowns. Custom button text isn't supported.

Variations

With all 14 images, 5 headlines and 5 descriptions, the ad can have up to 350 variations. Ads with fewer variations tend to perform worse, for example with a higher cost per click or a lower click-through rate.

What's next

Need help? Reach out to your Solutions Engineer via the chat in the bottom-left corner of the N.Rich platform, by email or Slack.