TikTok Global App Bundle image ad sizes: 9:16, 16:9, 1:1

TikTok's Global App Bundle image ads take three shapes: 9:16 at 720x1280 or larger (recommended), 16:9 at 1280x720 or larger, and 1:1 at 640x640 or larger. Files are JPG, JPEG or PNG within 100 MB. Ask Sume for a matching aspect_ratio, and avoid webp as the output_format.

Numbers are from TikTok's help page (last updated September 2026) and Sume's image and images docs, read 2026-10-01. For the video version of this bundle, see TikTok App Bundle video ad specs.

What sizes does the page list?

The page lists these under a heading that says video resolution, but it sits in the image ad article. It also lists the placements (App Open, In-Feed, 2-Column Feed, Banner, Interstitial and Native, across CapCut and Fizzo) and says to look at other articles for other TikTok ad formats.

How do I ask Sume for these shapes?

Sume's aspect_ratio list for stills includes 9:16, 16:9 and 1:1. A model only accepts the values its catalog lists, so read supported_parameters before pinning one. Pick png or jpeg for output_format; the field also allows webp, which is not on TikTok's list.

Can I set exact pixels?

Only on models that take custom pixels, such as the GPT family: both edges must be multiples of 16 and the total pixel count must be 655,360 to 8,294,400. That fits 720x1280 (921,600) and 1280x720. It does not fit 640x640 (409,600), so a custom-pixel square needs a larger edge, for example 1024x1024 (1,048,576). Since TikTok's numbers are minimums, a larger square is fine on the page's terms.

{
  "prompt": "App icon on a clean gradient, centered",
  "image_size": "720x1280",
  "output_format": "png"
}

What does the docs not promise?

Sume's docs list custom pixels only for some model families; on others, the size follows the native aspect_ratio. So read the delivered width and height against the minimums, and the file size against 100 MB, before you upload to TikTok.