Plan an ai ad video size as a placement specification, not as a last-minute resize. Start with the destination's current requirements, then decide the crop, subject scale, caption-safe area, duration, and CTA position for each version. Pippit recommends 9:16 for vertical placements such as TikTok, Instagram Reels, and YouTube Shorts and 16:9 for widescreen or in-stream placements; verify the destination's latest requirements before export.
Build a placement variant specification
The exact technical specification belongs to the destination. This table is a creative handoff that makes the visible decisions explicit.
Recompose the frame instead of shrinking it
A vertical cut usually needs a tighter subject scale and a clearer first action. A widescreen cut can use context on the sides, but the product should not become a small detail. A square cut often needs a new balance between the product and the caption area. Exporting one frame three times may preserve dimensions while losing the message.
Write a short specification for every version:
- primary subject and its approximate screen position;
- first proof moment and the time it should appear;
- caption-safe area and maximum line length;
- CTA position and the destination it names;
- background and visual continuity rules;
- version label and final review owner.
For one product, a filled first specification could be: 9:16: keep the bottle large in the center, show the proof action in the opening seconds, and reserve the lower area for captions; 1:1: recompose the bottle slightly smaller with one proof detail and one CTA; 16:9: place the bottle left of center and use the right side for the approved message. Add one failure note to each version: bottom UI may cover the vertical CTA, the square crop may remove the product base, and the widescreen crop may delay the proof because of extra context. Keep the product, claim, and proof stable across versions so the test compares placement rather than three different ads.
Keep captions and CTA inside the usable area
In Pippit, use customizable scripts, text overlays, and editing controls to keep important language readable. Do not rely on a default crop to protect it. Preview each variant on a small screen. If a word, product edge, or CTA sits near the frame boundary, move it inward and check the whole sequence again.
Captions should reflect the approved brief. Do not add a stronger claim just because the vertical version has less room. Shorter language is safer than smaller language.
Use one source of truth for three versions
Keep the product, claim, proof, and CTA stable across the first placement set. Change framing, pacing, and visual emphasis only where the destination requires it. Label versions with the destination and aspect ratio so the test pack does not mix a crop variant with a message variant.
After you create the drafts in the AI ad video maker, preview each one before export. The current workflow describes preview, final adjustments, and export; the review step is where you catch a cropped product, hidden caption, or CTA that no longer matches the destination.
This guide stops at delivery variants. It does not choose audiences, budgets, bids, or performance claims. Use the human review checklist before testing.
Final check
An ai ad video size plan is ready when each destination has its own crop, safe area, caption, CTA, and review decision. If a version only works when the viewer zooms in or guesses what was cropped, recompose it before export.
FAQs
What ai ad video size should I start with?
Start with the destination. Pippit recommends 9:16 for vertical placements and 16:9 for widescreen or in-stream placements, but the destination's latest requirements take priority.
Can I resize one video for every placement?
You can create a technical crop, but a better variant often needs recomposed subject scale, captions, and CTA. Preview each version instead of assuming the crop preserves the message.
Where should captions go?
Keep captions inside a tested safe area, away from likely interface overlays and frame edges. Check them at the size where a viewer will actually see the ad.