CampaignReel

Ad placement specs against what generators output

TikTok states three shapes and a floor under each

The help page states vertical nine by sixteen at 540x960 or more, horizontal sixteen by nine at 960x540 or more and square one by one at 640x640 or more. It is the only page in this register that publishes a shape and a pixel floor in the same sentence. As of 2026-09-12.

A floor and a shape are not equal gatesThe pixel minimums are cleared by the cheapest tier on almost every row in this register. The shapes are the binding half, and six entries publish nothing about shape at all.Which half of the rule is actually hardThe pixel floorSatisfied everywhere540x960 sits under the cheapest rung on almost everyrow here.The shapeOften unanswerableSix entries never state a shape, so the check cannotbe made at all.Three shapes, and square is the rarest on the generator side
Fig. 1 A spec sheet listing a shape and a minimum size together invites reading them as equally hard.
Minimum dimensions in the spec, by shapeBars are the minimum dimensions as each page publishes it. Placement rules and tool limits are never mixed on one axis.Minimum dimensions in the spec, by shape16:9 horizontal960x540960x5401:1 square640x640640x6409:16 vertical540x960540x960
Fig. 2 Bars are the minimum dimensions as each page publishes it. Placement rules and tool limits are never mixed on one axis.
The three accepted shapes and the minimum under each. Recorded 2026-09-12.
ShapeMinimum dimensionsHow many generators here publish this shape
9:16 vertical540x960Five of the nine that publish shapes at all
16:9 horizontal960x540All nine
1:1 square640x640Three

Inclusion rule. Shapes and minimum dimensions stated on the platform's own specifications page for non-Spark ads, counted against the generator rows in this register that publish a shape. Order. As the help page lists the shapes.

1The floors are easy and the shapes are not

540 by 960 is below the cheapest resolution rung on almost every row in this register, so the pixel minimums are cleared without thought. The shapes are the binding half: six entries publish nothing about output shape, and for those the check cannot be made at all.

A spec sheet that lists a shape and a minimum size together invites reading them as equally hard gates. They are not. One is satisfied by the cheapest tier available and the other decides whether a piece can be generated for the placement in the first place.

2Square is the shape most generators here do not publish

Three of the fifteen entries in this register publish a one by one option. Square is accepted by this surface from 640x640 upward, so a campaign that wants it has a narrow set of rows to generate from and a wide set to crop from.

Cropping to square from widescreen loses a third of the frame horizontally, which moves a subject that was composed off-centre outside the picture. That is the cost this column exists to make visible, and it is why the register counts shapes rather than assuming them.

3Shape and file are published together here, and never on the other surface

The same page carries a 500 MB cap, a 516 kbps bitrate floor and a list of five containers. The other surface in this register publishes durations and billing behaviour and nothing about the file at all.

That split is the clearest structural finding on these sheets. Each surface documents what it refuses at the door, and the two doors are guarded against different things, so a single ad specification covering both has to be assembled from two pages that barely overlap.

4Where this cell sits in the column

Aspect ratio, surface by surfaceWhat each surface states in the aspect ratio column, TikTok marked. Generator output is not on this axis. Recorded 2026-09-22.Aspect ratio, surface by surfaceAspect ratioTikTokTikTok — Aspect ratio: 9:16, 16:9 and 1:1, each with a pixel floorYouTubeYouTube — Aspect ratio: 16:9, stated for the Masthead alone
Fig. 3 What each surface states in the aspect ratio column, TikTok marked. Generator output is not on this axis. Recorded 2026-09-22.
Every surface in the register on the aspect ratio column, with TikTok marked. Recorded 2026-09-22.
SurfaceAspect ratio
TikTok9:16, 16:9 and 1:1, each with a pixel floor
YouTube16:9, stated for the Masthead alone

Inclusion rule. The two surfaces this register reads, carrying what each one's own help page states in this column. Generator limits are on a separate axis and are never folded in. Order. Alphabetical by surface name.

5Sources

Read from the TikTok video ad specifications, checked 2026-09-12. The column itself is described on aspect ratio, and the rule that keeps surfaces and generators apart is on method. Next along this column: SceneMixer, Google Veo.