Video ad sizes 2026: TikTok, Reels, and Shorts

Video ad sizes 2026 reduce to three ratios: 9:16 vertical (1080×1920), 1:1 square (1080×1080), and 16:9 horizontal (1920×1080). TikTok, Reels, and Shorts all run on 9:16 — a single master covers most short-form placements. The other two ratios exist for the parts of feed and YouTube that haven't migrated to vertical yet, and they belong in every export pipeline.

For a founder or marketer shipping ads this quarter, the real question isn't "what are the dimensions" — it's "what do I export, in what order, to spend the least time on rework." This is the spec sheet and the order.

Why 9:16 is the default in 2026

Vertical is no longer one option among many. Short-form players on TikTok, Instagram Reels, and YouTube Shorts are built around a 9:16 viewport, and they crop or letterbox anything that isn't. The signal is consistent across networks: the upload UI defaults to 9:16, the recommendation engine surfaces 9:16 first, and the comment-and-share UI sits overlaid on the bottom of a 9:16 frame.

Even Meta's main feed now favors vertical creative, with its placement guidance pushing 9:16 into feed and Stories alongside Reels. The practical takeaway: every ad concept should start as a 9:16 master, then crop down. Square and horizontal are derivatives, not co-equals. Teams that still draft in 16:9 and "make it work for vertical later" usually re-shoot, because the staging that flatters a wide frame buries the subject in a tall one.

What aspect ratio should a TikTok ad be?

A TikTok ad in 2026 is 9:16 at 1080×1920, MP4 or MOV, encoded as H.264 or H.265. Keep about 150 px clear at the top and 130 px clear at the bottom — that's where TikTok stacks the username, caption, and CTA button on every device. In-feed video ads run up to 60 seconds, though TikTok's own creative guidance points to roughly 21–34 seconds for the highest completion rate. Spark Ads (paid amplification of organic posts) inherit the original post's specs, so a longer organic upload can run as a Spark Ad as long as it was filmed vertically.

A few specs that catch teams out: TikTok auto-overlays its own captions near the bottom strip, so keep on-screen text in the upper two-thirds. The official safe-zone diagram and ad spec page lives on TikTok's creator portal.

What size is a Reels ad in 2026?

Reels ads on Instagram and Facebook run at 9:16, 1080×1920, MP4 or MOV, with a 4 GB file ceiling and a 90-second duration cap for paid placements. Keep the bottom 250 px clear — the like, comment, share, and profile column overlap that strip on almost every device. Reels auto-loop, which means a strong loop point on the last frame can stretch a 15-second ad into a 30-second viewing session at no extra cost.

A small but useful detail: Meta now serves a Reels-shaped placement inside the Facebook feed, so a single 9:16 Reels asset can appear in three placements — Reels, Stories, and feed — without a re-export. Meta's Reels ad specs page is the source of truth and updates silently, so re-check before each campaign.

What dimensions does YouTube Shorts use?

A YouTube Shorts ad is 9:16, 1080×1920, up to 60 seconds, served through Google Ads as a Video Action or Demand Gen campaign. Shorts will accept 16:9 or 1:1 and play them letterboxed, but letterboxing consistently underperforms — the player is vertical, the viewer's thumb is on the next-video gesture, and any black bars read as "this isn't native here." A clean 9:16 master under 60 seconds is the safest path.

One quirk to know: if your upload exceeds 60 seconds, YouTube routes it to the standard watch page instead of the Shorts shelf, even if the file is 9:16. Keep Shorts ads under the cap. Reference: Google Ads video specs.

When should you ship 1:1 or 16:9 instead of 9:16?

9:16 covers TikTok, Reels, and Shorts. 1:1 and 16:9 still belong in the export queue for these placements:

• 1:1 (1080×1080) — Meta in-feed (Facebook and Instagram main feeds), Pinterest standard pins, LinkedIn sponsored content. Square uses less screen real estate than vertical in feed but renders consistently across desktop and mobile.
• 16:9 (1920×1080) — YouTube pre-roll, bumper ads on the watch page, OTT/CTV inventory, and programmatic display video. Don't crop a 9:16 into 16:9 without re-framing — most 9:16 shots fall apart in widescreen because the subject was lit and staged for a tall frame.

If you have to skip one, skip 16:9 first. Most short-form budgets in 2026 don't fund YouTube pre-roll, and CTV usually demands its own creative anyway.

How do you build one master and crop to all three?

Three habits make cropping painless:

1. Frame the subject in the center vertical third. Anything inside that column survives both the 1:1 and 16:9 crop without a re-shoot.
2. Burn captions per export, not once. The safe zone is different in each ratio — a caption that sits perfectly in 9:16 will collide with the YouTube progress bar in 16:9.
3. Hook in the top 60% of the 9:16 frame. The bottom 40% is where TikTok and Reels stack their UI; a hook buried there is invisible to most viewers.

A clean export pipeline saves all three crops from the same render, so the framing decisions happen once instead of three times.

How does Vinora fit?

Vinora builds the 9:16 master from a product image or store link, then exports 1:1 and 16:9 crops from the same job. Concept, script, video, voice, music, and captions all come out of one chat, which keeps framing and tone consistent across ratios. If you're choosing a workflow, the Vinora pricing page lists per-plan render limits, and the short-form ad length guide covers when a 15-second cut beats the full 60.

Ship the 9:16 master first

Build for 9:16, frame for 1:1, leave 16:9 last. That single export order eliminates most of the rework teams burn the second half of their day on. The platforms will keep changing safe zones and length caps — the order of operations won't, and Vinora's render pipeline ships all three crops from one source so you only frame the shot once.