What size is a Facebook ad?

1080 by 1350 pixels (4:5 portrait) is the safest size for the feed. 1:1 square (1080 by 1080) and 9:16 vertical (1080 by 1920) for Stories and Reels are also supported.

What is the best Instagram ad size?

4:5 portrait (1080 by 1350) for the feed, and 9:16 vertical (1080 by 1920) for Stories and Reels.

What ratio should Meta ads be?

4:5 portrait for the feed is the default. 1:1 square and 9:16 vertical cover the other placements.

Does Meta still have a 20 percent text rule?

No. Meta removed the hard 20 percent text limit, but ads with less on-image text still tend to perform better and read more clearly on a phone.

Facebook and Instagram ad sizes and specs (Meta ad specs)

The safest default for a Meta ad image is 1080 by 1350 pixels, a 4:5 portrait ratio, which fits the Facebook and Instagram feed and takes up the most vertical space on a phone. For Stories and Reels use 1080 by 1920 (9:16), and 1080 by 1080 (1:1 square) is a reliable all-rounder across placements.

Meta will crop or letterbox anything that does not match a placement, so designing to these ratios keeps your ad looking intentional. Below are the sizes worth designing for, and the rules that keep an ad legible once it is shrunk to thumbnail size on a phone.

Image ad sizes

These are the image sizes worth designing for:

4:5 portrait, 1080 by 1350 pixels, the best default for Facebook and Instagram feeds.
1:1 square, 1080 by 1080 pixels, a dependable all-rounder across placements.
9:16 vertical, 1080 by 1920 pixels, for Stories and Reels.
1.91:1 landscape, 1200 by 628 pixels, used by some placements and link previews.
Use JPG or PNG, and keep the file well under Meta's 30 MB limit.

Video ad sizes

If you do run video, the same ratios apply. Use 4:5 or 1:1 for the feed and 9:16 for Stories and Reels, at 1080 pixels on the short edge. Keep the first second strong, and caption it, because most people watch on mute.

Text and safe zones

Meta removed the old hard limit on how much of an image could be text, but ads with less text still tend to perform better and read more clearly on mobile. Keep important elements away from the outer edges, and on Stories and Reels leave the top and bottom clear so the platform's own buttons do not cover your message.

Which size should you actually use

If you make one asset, make it 4:5 for the feed, where most impressions happen. Add a 9:16 version for Stories and Reels when you can. A 1:1 square is a fine compromise if you need a single image to run everywhere.

The size is not the ad

A perfectly sized ad with a weak idea still fails. Pair the correct dimensions with a proven structure: see the guides on how to make Meta ads and winning Meta ads. Mockingbird outputs finished static ads at 4:5 portrait, ready to upload.

Frequently asked questions

What size is a Facebook ad?: 1080 by 1350 pixels (4:5 portrait) is the safest size for the feed. 1:1 square (1080 by 1080) and 9:16 vertical (1080 by 1920) for Stories and Reels are also supported.
What is the best Instagram ad size?: 4:5 portrait (1080 by 1350) for the feed, and 9:16 vertical (1080 by 1920) for Stories and Reels.
What ratio should Meta ads be?: 4:5 portrait for the feed is the default. 1:1 square and 9:16 vertical cover the other placements.
Does Meta still have a 20 percent text rule?: No. Meta removed the hard 20 percent text limit, but ads with less on-image text still tend to perform better and read more clearly on a phone.