Facebook Reels Image Ad Specs: 1440x2560, 40 and 55 Characters

What are the Facebook Reels image ad specs?

Meta's page for Awareness image ads on Facebook Reels lists JPG or PNG, 9:16, 1440x2560, 30 MB, a minimum of 600 px on each side, and a 3% tolerance. Primary text is 40 characters and the headline is 55. The safe zone is roughly 14% at the top, 35% at the bottom and 6% at each side.

The page also notes that, because of the small image size, Meta recommends not adding text on the image. I read it on 2026-10-03.

How does it differ from the Instagram Reels image ad?

The Instagram page shares the 1440x2560 size and 30 MB limit but gives a 500 px minimum, a 1% tolerance and 44 characters of primary text, with no headline field in what I read. Two near-identical formats with different numbers is the reason to keep one spec table per placement and not one for all of Meta.

How do I make the still with Sume?

POST /v1/images with model: "sume/auto" and aspect_ratio: "9:16" returns a vertical image. Sume documents custom pixel sizes on one model, gpt-image-2.5, which accepts an image_size with both edges multiples of 16, a maximum edge of 3840 and an aspect of at most 3:1. 1440 and 2560 are both multiples of 16, so 1440x2560 fits those rules. Check the model's catalog entry before relying on it.

Add an Idempotency-Key header to the write, and save the output as PNG or JPEG.

curl https://api.sume.com/v1/images \
  -H "Authorization: Bearer $SUME_API_KEY" \
  -H "Idempotency-Key: $(uuidgen)" \
  -H "Content-Type: application/json" \
  -d '{"model":"sume/auto","prompt":"Running shoe on a wet street at dusk, centred","aspect_ratio":"9:16","output_format":"png"}'

What should go in the image and what should not?

Meta says not to add text on this image. Keep the subject in the middle band that survives the 14% and 35% margins, and put your offer in the primary text and headline. If you need a still plus motion, compose the still over a clip with Sume's timeline compose endpoint, which takes one still and one video in a stack or overlay at $0.02 per job.