Facebook ad specs have a habit of shifting just when you've finally memorized them. New placements roll out, dimensions get tweaked, and short-form video keeps reshaping what "good creative" even looks like. So why bother keeping up? Because Facebook (and its parent, Meta) still commands a huge slice of global digital ad spend, with billions of people across Facebook and Instagram spending a meaningful chunk of their day inside the apps. For most small businesses in 2026, it remains the most reliable place to put a dollar in and get a customer out.
The catch: an ad that's the wrong size gets cropped, blurred, or quietly down-ranked. Below is a friendly, current reference for the sizes that actually matter this year, plus a few notes on getting the most from each one.
Why correct sizing still pays off in 2026
Meta's ad system rewards creative that fits its placements cleanly. When your image or video matches the recommended dimensions, it displays sharp, fills the available space, and tends to earn a better quality score, which can lower your cost per result. Get it wrong and the algorithm either crops awkwardly or limits where your ad can run. The good news: Meta's Advantage+ tools now auto-adjust a single upload across placements, but they work best when you start from properly sized source files.
Facebook feed image and video ads
The in-feed ad is still the workhorse. For images, upload at 1080 x 1080 pixels (1:1 square) or 1080 x 1350 (4:5 vertical). The taller 4:5 ratio takes up more screen real estate on phones, where the vast majority of your audience is scrolling, so it's usually the stronger performer.
- Recommended resolution: at least 1080 pixels wide
- Format: JPG or PNG for images; MP4 or MOV for video
- Video aspect ratio: 4:5 or 1:1 for feed; keep it under a few minutes, but the first 3 seconds carry the most weight
- Primary text: around 125 characters before the "see more" cutoff
- Headline: roughly 27 to 40 characters
Keep heavy text off the image itself. The old hard "20% text" rule is gone, but image-heavy-with-text creative still tends to underperform, so let the copy do the talking and the visual do the catching.
Reels and Stories: the vertical, full-screen formats
If you only optimize one format this year, make it vertical video. Reels ads sit alongside organic short-form clips and are where a lot of discovery now happens. Stories ads share the same shape and are great for quick, swipe-friendly promos.
- Dimensions: 1080 x 1920 pixels (9:16 full vertical)
- Reels length: short and punchy wins; aim for 15 to 30 seconds
- Safe zone: keep logos, captions, and your call to action away from the top and bottom 14% or so, where the interface buttons and profile name sit
- Captions: add them; most people watch with the sound off at first
Shoot natively vertical rather than cropping a horizontal clip. Footage that looks like it belongs on the platform consistently beats footage that looks like a repurposed TV spot.
Carousel ads
Carousels let you show two to ten images or videos in a single swipeable ad, each with its own link. They're ideal for showcasing a product range, telling a step-by-step story, or stacking several customer testimonials.
- Image or video size: 1080 x 1080 (1:1) for each card
- Cards: 2 to 10, all the same shape
- Headline per card: around 32 characters
Right-column and Marketplace placements
On desktop, ads still appear in the right-hand column, and Meta serves ads inside Marketplace and Search too. You generally don't need separate creative for these. Upload your 1:1 or 4:5 assets and let Meta's placement optimization handle the rest. Just preview before you publish so nothing important gets cropped.
A quick 2026 cheat sheet
- Feed image: 1080 x 1080 or 1080 x 1350
- Feed video: 1:1 or 4:5, 1080px wide minimum
- Reels and Stories: 1080 x 1920 (9:16)
- Carousel: 1080 x 1080 per card
- File types: JPG/PNG images, MP4/MOV video
Make every ad work harder
Correct sizing gets you in the door, but a few habits separate ads that convert from ads that just spend. Lead with motion and a clear hook in the first second. Design for sound-off viewing with captions. Use AI-assisted tools, including Meta's own Advantage+ creative features, to test multiple headlines and variations quickly, then keep what works. And remember that more shoppers now research through AI search and answer engines as well, so the landing page behind your ad should be clear and easy to summarize.
If keeping up with shifting specs, fresh creative, and weekly testing sounds like one job too many, that's exactly what a done-for-you service is for. At $99 Social, we create, size, and schedule on-brand content so your ads always look right and your time stays free for running your business. Get the sizes right, keep the creative current, and let the platform do what it does best in 2026: connect you with the customers already nearby.
