Are all Facebook videos Reels now?

Yes — since Meta's June 2025 change, videos posted to Facebook are shared as Reels, whatever their length or shape.

What size is a Facebook Reel?

9:16, 1080 × 1920 recommended. Through Meta's Reels API: MP4, at least 540 × 960, 3 to 90 seconds.

What image size works on Facebook?

Facebook publishes no single size we could check. 1080 × 1350 (4:5) or square, saved as JPG under 15 MB, is the common advice.

PaperFlight

FACEBOOK · SIZES AND SPECS

Facebook sizes,
checked for 2026.

Since mid-2025 every Facebook video is a Reel. Here is what that means for size and length, what is known about images, and what is not stated anywhere official.

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THE SHORT ANSWER

Since June 2025, every video posted to Facebook is shared as a Reel, so make video vertical, 9:16 at 1080 × 1920. Tools posting through Meta's Reels API are held to MP4, at least 540 × 960, and 3 to 90 seconds. For photos, a JPG under 15 MB is widely reported to work best. A post holds 63,206 characters.

Video (Reels)

Every video is a Reel: Since June 2025Meta said videos will be shared as Reels whatever their length or shape.
Shape: 9:16 · 1080 × 1920 recommended
Through Meta's Reels API: MP4 · at least 540 × 960 · 3 to 90 secondsWhat a scheduling tool is held to; 24–60 fps.

Images

File: JPG under 15 MBWidely reported, not on a Meta page we could check: large PNGs can look soft.
Size we recommend: 1080 × 1350 (4:5) or 1080 × 1080
Photos in one post: Not statedOnly third-party figures were found.

Text

Post: 63,206 charactersLong posts fold behind “See more”.

What works on Facebook.

Make video vertical — it is a Reel now, whatever you meant it to be.
Keep a Reel you schedule under 90 seconds; that is what the API takes.
Save images as JPG rather than large PNGs.
Ask a question in the post — Facebook is where people still reply.

WITH PAPERFLIGHT

Facebook gets its own version of every post.

PaperFlight draws feed posts at 1080 × 1350 (4:5) and full-screen video at 1080 × 1920 (9:16).
Images go out as JPG; a slide post is sent as a multi-image post in order.
The caption is written for Facebook, with your sign-off.
Your AI CMO plans the week, the team writes and designs each post, and you approve — or let it publish on its own.

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Questions people ask.

Are all Facebook videos Reels now?: Yes — since Meta's June 2025 change, videos posted to Facebook are shared as Reels, whatever their length or shape.
What size is a Facebook Reel?: 9:16, 1080 × 1920 recommended. Through Meta's Reels API: MP4, at least 540 × 960, 3 to 90 seconds.
What image size works on Facebook?: Facebook publishes no single size we could check. 1080 × 1350 (4:5) or square, saved as JPG under 15 MB, is the common advice.
What is the Facebook character limit?: 63,206 characters for a post.

Hire the team. Keep your mornings.

PaperFlight is an AI CMO with its own team: it plans the week, writes and designs every post in your brand — at the right size for Facebook and seven other channels — publishes it and learns from the results. 7 days free, no card.

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Last checked 6 October 2026. Platforms change their specs often and some numbers come from their developer docs rather than the app — check the help pages before you rely on one.

Facebook sizes,checked for 2026.