Which entries publish an ultrawide shape
Four entries publish twenty-one by nine, and one of them publishes nine by twenty-one as well. Neither ad surface these sheets read states an ultrawide shape, so the value of these cells is reuse beyond the placement rather than the placement itself. As of 2026-10-25.
| Item | What is published | Detail |
|---|---|---|
| 21:9 | Four entries | Panels, banners and frames inside a designed layout |
| 9:21 | One entry | A tall strip that survives heavy interface overlay |
| Asked for by any surface here | Neither shape | Both are production options, not requirements |
Inclusion rule. Shapes each page publishes for its own output. Shapes reachable by cropping in an editor are not published output shapes and are not counted. Order. The more common shape first.
1An unusual shape is only worth having at generation time
Cropping widescreen to ultrawide throws away the top and bottom of the frame, and a subject composed for the full height ends up cut. Where the shape is a parameter, the piece is staged for it instead.
That is the general argument for a long shape list, and it applies harder the shorter the piece. A six second ad is usually one framing, and a framing generated for the wrong shape cannot be rescued.
2The vertical ultrawide has no equivalent anywhere here
Nine by twenty-one appears on one page and nowhere else in the register. What it serves is a frame inside a frame: a very tall strip that keeps its content clear of interface overlay at the top and bottom of a phone screen.
No surface these sheets read states it, so it is not a placement. It is recorded because the shape column is a record of what can be generated rather than of what is demanded.
3What the four entries have in common
All four publish long shape lists, from six values to eight, and three of them also publish a square option. An entry that bothers to list ultrawide tends to list everything else as well.
The inverse holds too: six entries in this register publish no shape at all, and none of them is close to an ultrawide. The column is bimodal rather than graded, which is worth knowing before a campaign picks a shape and then looks for a tool.
- Aspect ratios offered1:1, 4:3, 3:4, 16:9, 9:16, 9:21, 21:9from 9:21 to 21:9
- Aspect ratios; for image-to-video the ratio follows the input image21:9, 16:9, 4:3, 1:1, 3:4 and 9:16, required and never adaptive for text-to-video
- Aspect ratios row16:9, 4:3, 1:1, 3:4, 9:16, 2:3, 3:2 and 21:9 on v6 and c1
- Aspect ratios offeredadaptive, the default, then 21:9, 16:9, 4:3, 1:1, 3:4 and 9:16
4Making the ad itself
For ad work around “Wider than widescreen”, SceneMixer's pages explain how its ad projects are produced:
Sixty to a hundred and twenty seconds is the working band for vertical short drama, and the outline paces for it.
SceneMixer, AI Drama for TikTok & Reels — “How long should a feed episode be?” (read 2026-10-13)
An AI short drama is a serialized show of 60–120 second vertical episodes whose cast, sets and footage are generated by AI. Making one takes six steps: analyze the script into episodes, lock a consistent cast with reference art, localize for your market, write and edit storyboards, generate each 4–15 second shot, then composite and publish.
SceneMixer, How to Make an AI Short Drama, Step by Step (read 2026-10-13)
5Sources
Format requirements come from Google Ads Help, read 2026-09-12, and tool limits from each vendor page listed on published limits, read 2026-09-22 and 2026-10-25. The rule against mixing the two is on method. Nearby: The square option, Identifiers and ceilings, Nothing about shape.