The short version: There is no single correct size for a Facebook ad image because Facebook ads run across at least six different placements, each with its own ideal ratio. For feed and Marketplace go with 1080 x 1080 pixels (1:1) or 1080 x 1350 (4:5), for Stories and Reels go 1080 x 1920 (9:16), and for the old right-hand column stick with 1:1. Get the ratio wrong and Meta will crop your image automatically, often through someone’s face, and you won’t find out until you’ve already spent money on it.
Useful alongside this: chatgpt images 2 0 review.
Why “one image, one size” doesn’t exist on Facebook ads
I get asked this at least once a week by someone setting up their first campaign in Ads Manager, and I understand why it’s confusing. Instagram gives you a fairly settled answer these days (I’ve written about the correct dimensions for an Instagram post if you need that too), but Facebook ads aren’t one product. When you tick “Advantage+ placements” (the default, and the one nearly everyone leaves ticked), your ad can show up in the main feed, the right column on desktop, Marketplace, Stories, Reels, in-stream video breaks, and Audience Network apps. That’s up to eight different shapes of screen real estate for one campaign.
Meta will happily take a single image and stretch or crop it to fit all of them. It will not tell you the result looks bad. I’ve seen a single 1200 x 628 landscape image, uploaded once because someone was in a rush, get squeezed into a 9:16 Stories slot and turn a product shot into a tall thin strip with the logo cut clean off the top. The campaign ran for four days like that before the client spotted it in the preview panel. That’s real budget spent on an ad that looked broken, and nobody at Meta flags it for you.
The actual dimensions, placement by placement
These are the numbers I use when I’m briefing a designer or building creative myself, current as of 2026:
- Facebook Feed (mobile and desktop): 1080 x 1080 px (1:1 square) or 1080 x 1350 px (4:5 portrait). Minimum accepted is 600 x 600 px but you’ll lose sharpness on larger screens if you go that low.
- Facebook Stories and Reels: 1080 x 1920 px (9:16, full vertical screen). Keep text and logos out of the top 250 px and bottom 250 px, that’s where the profile name, CTA button and progress bar sit on top of your image.
- Marketplace: 1080 x 1080 px (1:1). Marketplace crops hard to square no matter what you upload, so don’t bother sending it anything else.
- Right column (desktop only, still exists though barely anyone runs it deliberately): 1080 x 1080 px (1:1), shown much smaller, so avoid fine detail or small text.
- Carousel cards: 1080 x 1080 px (1:1) per card, minimum 600 x 600 px.
- Collection ads (cover image): 1200 x 628 px (1.91:1) or 1080 x 1080 px depending on template.
- Instant Articles / Audience Network: ranges from 1.91:1 to 1:1, and honestly this placement performs so unpredictably I’d rather exclude it than design for it specially.
File-wise: JPG or PNG, maximum 30MB, and Meta allows roughly a 3 percent tolerance on aspect ratio before it starts cropping oddly, so don’t assume “close enough” is close enough.
The step most people skip (and why it’s costing them money)
Here’s the bit that nobody wants to hear because it takes an extra fifteen minutes: ticking Advantage+ placements and uploading one image is the single most common way people waste ad spend on Facebook. It’s not the algorithm, it’s not your targeting, it’s a square image getting mangled into a vertical slot nobody checked. I’ve audited accounts where 30 to 40 percent of impressions were going to Stories and Reels while every image asset was designed only for the square feed placement. Nobody was losing sleep over it because the campaign was still “running”, just quietly underperforming.
The fix, in practical steps:
- In Ads Manager, go into the ad set and choose Manual Placements instead of leaving Advantage+ on autopilot.
- Select only the placements you want, or if you keep Advantage+ on, use the “Add customization” option in the ad creation panel to upload a separate cropped version for Feed, Stories, and Reels.
- Design your master image at the largest size you’ll need, 1080 x 1920 px, then crop down for square and 4:5 rather than stretching a small square image up.
- Always check the Stories/Reels preview inside Ads Manager before publishing, not after. It’s a single click and it catches nine out of ten cropping disasters.
Skipping this step is exactly how a perfectly good ad ends up looking amateur, in the same way a badly configured page can end up looking half-broken to visitors, which I’ve covered separately when people ask why their Facebook Page looks black or broken. Same root cause both times: nobody checked what it looked like on the device people were seeing it on.
The uncomfortable truth about “recommended” sizes
Meta’s own help pages have quietly nudged people toward 1:1 square as the “safe” recommendation for years, and most articles on this topic just repeat that number without questioning it. In my own testing across client accounts through 2025 and into 2026, 4:5 portrait (1080 x 1350) has consistently outperformed 1:1 square on cost per click in the main feed, sometimes by 15 to 20 percent, simply because it takes up more vertical space on a phone screen and stops the thumb scrolling for a fraction longer. Facebook doesn’t advertise that fact because it doesn’t sell them more inventory either way. But if you’re only ever building square creative because that’s what the spec sheet says, you’re leaving cheaper clicks on the table.
The same logic applies to text on images. The old “20% text rule” is technically gone from Meta’s policy, but ads that are mostly text still get throttled on delivery and cost more per result. I still design as if the rule exists: image does the work, text is a headline of five words or fewer sitting in the frame, everything else goes in the ad copy field where it belongs.
Tools that make this less painful
You don’t need Photoshop skills to hit these dimensions correctly. If you’re building creative in bulk, it’s worth comparing options rather than guessing, which is why I put together a breakdown of Facebook ad creator software that export the right placement sizes automatically instead of forcing you to do the maths yourself. For quick one-off edits, cropping, or cleaning up a product photo before it goes into an ad, I’ve also shown how to use ChatGPT to edit and enhance photos, which is a faster fix than opening a full design tool for a five-minute job.
And if your ad creative doubles up as organic content for Stories outside of paid campaigns, the safe zones and sizing logic are close enough to what I’ve written about for Instagram Story image sizing that you can largely reuse the same master file across both platforms, provided you check the preview each time rather than assuming it’ll transfer perfectly.
A quick real example
Last year I ran a small test for a client selling handmade candles, nothing glamorous, £15 a day budget across two ad sets. One ad set used a single 1200 x 628 landscape banner across all placements. The other used a 1080 x 1350 portrait image for feed and a separately customised 1080 x 1920 vertical version for Stories and Reels. Same product, same copy, same targeting, same budget. Over ten days the sized set delivered clicks at £0.38 versus £0.61 for the single-image set, and the click-through rate was nearly double. Nothing else changed except the dimensions matching the placement. That’s the whole argument in one small test.
A simple checklist before you hit publish
- 1080 x 1080 for feed, Marketplace, and carousel cards
- 1080 x 1350 for feed if you want the taller, higher performing crop
- 1080 x 1920 for Stories and Reels, with a 250 px clear margin top and bottom
- Keep total file size under 30MB, use JPG or PNG
- Design the biggest version first, crop down, don’t stretch up
- Check the placement preview in Ads Manager before spending a penny
This is one of 80 Facebook guides; the full index is Facebook: every guide in one place.
Frequently asked questions
What is the best image size for a Facebook ad in the main feed?
1080 x 1080 pixels (1:1 square) is the safe default, but 1080 x 1350 pixels (4:5 portrait) has performed better in most of the client accounts I’ve tested through 2025 and 2026 because it takes up more of the mobile screen.
Do I need a different image for Facebook Stories ads?
Yes. Stories and Reels need a full vertical 1080 x 1920 image (9:16), and using a square or landscape image there will either get cropped badly or shown with large blank bars either side, so upload a separate version rather than relying on Meta to stretch one image to fit.
What happens if my image doesn’t match the recommended aspect ratio?
Facebook will automatically crop or stretch it to fit whatever placement it’s showing in, and Meta allows roughly 3 percent tolerance before that cropping becomes noticeable, meaning you can lose faces, logos, or key text from the frame without any warning that it’s happened.
Is there one universal image size that works everywhere on Facebook ads?
No, and that’s the honest problem with this whole topic: there is no single universal size, only a set of correct sizes per placement. It’s the same reality as sizing images for WhatsApp Business, where there’s technically no fixed spec either, just practical sizes that work, as I’ve covered in my piece on WhatsApp Business banner image sizing.
