- Meta’s new multi-media workflow lets you load up to 10 images and videos into a single ad, and Meta serves the best asset for each placement. It is still a limited test, so not every account has it.
- For scale, put your assets inside ONE multi-media ad. Do not split ten creatives into ten ads. Meta will crown one and starve the rest, and tiny ad sets never gather enough conversions to leave the learning phase.
- The new crop tool offers one ratio per category: 1:1, 9:16, or 1.91:1. It will not produce 4:5, the size Meta recommends for the Facebook Feed. Upload a native 4:5 instead.
- Build a crop-resistant set: 1:1, a 4:5 master with your headline, offer and CTA inside a centered square, and a native 9:16. Keep the money elements off the edges.
Quick answers: What multi-media ads are · One ad or many? · The crop trap · The three-size system · Safe zones · What it will not do
Key numbers, as of September 2026:
- Up to 10 images and videos, combined, in one multi-media ad (Meta Business Help).
- Meta’s stated minimum for a 4:5 feed image is 1440 x 1800 pixels (Meta Business Help).
- Meta recommends leaving 14% of the top, 35% of the bottom, and 6% of each side of a Reels asset clear (Meta Ads Guide).
- The new crop tool offers exactly one ratio per category: 1:1, 9:16, or 1.91:1, so 4:5 cannot be selected (Jon Loomer).
- An ad set needs roughly 50 optimization events in about a week to leave the learning phase, where cost per result runs higher (Meta Business Help, benchmark via DeepClick).
If you run Meta lead-gen, the thing worth protecting here is the creative that performs and the cost per lead behind it, not a tour of Ads Manager. If you run these accounts, we do this work every day, so the framing below is the one we use when we build the assets ourselves.
What Meta multi-media ads are, in one answer
A multi-media ad is one ad that holds up to 10 images and videos at once. Meta’s delivery system then matches the best asset to each placement and person, instead of you building a separate ad for every surface. It rolled out as a limited test in 2026, so your account may not have it yet (Meta Business Help).
The hard part is not the feature. It is the four Meta names that all sound alike, because mixing them up is how you make the wrong structure decision. Here is the plain version.
| Feature | What it is | Asset model | Container or enhancement |
|---|---|---|---|
| Multi-media workflow | The new single-ad workflow that holds many assets and customizes crop, text, URL and placement per asset (Meta) | Up to 10 images and videos in one ad | Container |
| Carousel | A swipeable ad of separate cards, each with its own link | Multiple cards, one link each | A different format (not supported inside multi-media) (Meta) |
| Flexible format | The older multi-asset container the new workflow effectively replaces; reportedly being phased out (Jon Loomer) | Up to 10 assets, less reporting detail | Container (legacy) |
| Advantage+ creative | The AI layer that touches up, crops or expands whatever ad you built (Meta) | Applies to any ad | Enhancement |
One ad with ten assets, or many ads in an ad set?
Put the ten assets inside one multi-media ad when the job is scale. Reserve separate ads and separate ad sets for deliberate creative testing, and keep those tests to a handful of concepts. That is the whole answer. Here is why it holds.
Meta’s own instruction is to consolidate. When you use the new workflow, “you don’t need to create separate ads for different placements or audiences. Instead, you can upload all your assets into a single ad and let Meta handle delivery automatically,” and the system “will automatically match the best media-to-placement combination for each impression” (Meta Business Help). Social Media Today read the same rollout the same way (Social Media Today).
The two structures people reach for instead both leak. Drop ten creatives as ten separate ads in one ad set and Meta will not split the budget evenly. It picks one or two early and barely spends on the rest, “even if it’s not the true top performer,” so you never get a clean read (lebesgue.io).
Fragment those same creatives into ten single-ad ad sets and you starve the math instead. Each ad set has to gather enough conversions to leave the learning phase, where results are unstable and cost per result runs higher (Meta Business Help). The number operators plan around is about 50 optimization events in a week (DeepClick). Ten thin ad sets rarely each hit that.
| Structure | What it is for | Budget effect | Learning-phase effect |
|---|---|---|---|
| One multi-media ad, many assets | Scale, the default | One budget, no fragmentation; Meta serves the best asset per placement (Meta) | Concentrated signal, exits learning fastest |
| Many ads in one ad set | Loose testing | Uneven; Meta crowns one and starves the rest (lebesgue.io) | One ad usually accumulates the events; the others read as noise |
| One ad per ad set, several ad sets | A clean creative test | Each ad set funds its own creative fairly (lebesgue.io) | Only reliable if each ad set clears the learning threshold |
So the two jobs want two shapes. To scale, load the assets into one multi-media ad and let delivery sort them. To test which concept wins, isolate a few concepts in their own ad sets, one ad each, and cap it at three to five so every one can gather data (lebesgue.io). Jon Loomer ran exactly the consolidation: he collapsed six separate ads, each with a different image and landing page, into one multi-media ad, keeping a different destination URL per image (Jon Loomer).
Multi-media lets you customize text per asset, so the creative wording matters as much as the structure. Here is a lead-gen build you can lift:
For how this plays out in a specific market, see our cuts on Meta ads for HVAC leads, U65 and ACA health insurance leads, and life insurance leads.
The crop trap: the new tool will not give you 4:5
Here is the change operators keep complaining about. In the current limited test, you can crop each asset to three sizes, but each category snaps to a single ratio. Square crops only to 1:1. Vertical crops only to 9:16. Horizontal appears to crop only to 1.91:1. Meta lists 4:5, 3:4 and 2:3 as supported vertical delivery ratios, yet the tool crops vertical only to 9:16, as observed in the test by Jon Loomer in April 2026 (Jon Loomer).
That is the exact problem, and it is worth stating precisely, because the fix depends on it. The tool is not auto-picking a wrong crop mid-edit. It is offering one ratio per category, and 4:5 is not on the menu. The separate auto-adjust behavior, where Meta reshapes your media to fit more placements, only happens when you do not crop at all (Meta Business Help).
Why does the missing 4:5 matter? Because 4:5 is the size Meta itself recommends for single-image ads in the Facebook Feed (Meta Business Help). If you let the tool crop your square to 1:1 for feed, you give up the vertical height that 4:5 gives you. If you swap to landscape because a 1.91:1 crop is offered, you move off the feed size Meta recommends. Neither is a good trade for a feed-first lead-gen campaign.
So keep uploading a native 4:5 for feed. Prepare the asset at 4:5 before it ever reaches the crop tool, and the tool has nothing to take away.
There is also an escape hatch on accounts that still have it. Hover over the “Media” section and click “Return to original single media experience” at the bottom of the tooltip to restore the old placement-specific workflow (Jon Loomer). It is not an info icon and it is not obvious, which is why most people miss it. Use it when you need precise per-placement control the new tool will not give you.
The crop-resistant three-size system
Build three files, every time, so no crop tool and no auto-adjustment can hurt you. The set is 1:1, 4:5, and 9:16. Label the numbers honestly, because “build size” and “Meta minimum” are not the same thing, and most guides blur them.
| Ratio | Common build size | Meta’s stated minimum | Where it serves |
|---|---|---|---|
| 1:1 square | 1080 x 1080 | 1080 x 1080 (Meta) | Universal fallback and Instagram Feed (Meta) |
| 4:5 portrait | 1080 x 1350 (AdsUploader) | 1440 x 1800 (Meta) | Facebook Feed, the heavy lifter (Meta) |
| 9:16 vertical | 1080 x 1920 | See note | Stories and Reels (Meta) |
Two precision points the spec guides usually get wrong. First, 1080 x 1350 is the long-standing build size for 4:5 (AdsUploader), but it now sits below Meta’s stated 4:5 minimum of 1440 x 1800 (Meta Business Help). Build the 4:5 at 1440 x 1800 or larger and you clear the minimum with room to spare. Second, the 9:16 resolution differs by Meta document. The Stories design page recommends 1080 x 1920 (Meta Business Help), while the Reels Ads Guide recommends 1440 x 2560 (Meta Ads Guide). Both are 9:16. Cite the one you build to and move on.
Make the 4:5 your master. Design it so the headline, main subject, offer and CTA all sit inside a centered square, with the extra height at top and bottom treated as expendable. That way the same file survives a crop to 1:1 without losing anything that sells, and you are not rebuilding creative every time a placement changes.
Then cut a native 9:16 from the same concept for Stories and Reels, with the key elements pulled toward the center and away from the interface. The template above is the one our designers build from, and you can rebuild it in any tool that shows pixel guides.
Safe zones and Advantage+ creative edge rules
The edges of a vertical ad are not yours. The interface sits there. For a Reels asset, Meta says to leave roughly 14% of the top, 35% of the bottom, and 6% of each side clear of text, logos and other key elements (Meta Ads Guide). That keeps the profile name and the call-to-action buttons off your message. If you run disclaimers, the safe-zone help page adds a harder floor: leave the bottom 40% free (Meta Business Help). Ads Manager has a safe-zone guardrail toggle that overlays those zones, and it is worth turning on for every vertical review.
The same edge discipline protects you from Advantage+ creative. This is the AI enhancement layer, and it is a different feature from Advantage+ placements, which decides where your ads show. We covered that one separately in blocking placements on Meta ads; do not let the shared name fool you into thinking they are the same control.
Advantage+ creative can reshape your asset. Unlike the crop-step auto-adjust, which only fires when you skip cropping, this can rework an asset you already built. Visual touch-ups crops and expands images to fit more placements, generating new pixels when it expands (Meta Business Help). Video touch-ups does the same for a single video ad, cropping or adding blurred padding to fit a 9:16 or 4:5 frame (Meta Business Help). Anything generative can invent detail on a busy background that looks wrong, so keep logos, prices, headlines, disclaimers and the CTA off the outer edges where a dynamic crop is most likely to catch them.
How to set the enhancements for lead-gen:
- Turn on the low-risk ones as defaults: brightness and contrast, and basic Visual touch-ups.
- Hold the generative ones at arm’s length. Image expansion and other generative fills deserve a manual review of every placement before they run.
- The real fix for a “cropped” warning is a purpose-built asset for that placement, not trusting the auto-crop (Meta Business Help).
- If you run insurance or finance offers, note that Meta may withhold some generative AI features from those regulated verticals anyway (Meta Business Help).
What multi-media ads will not do for you
The workflow is a real improvement, but it is not a strategy, and it does not fix the parts of the machine that actually decide cost per lead.
It will not make a weak offer convert. Meta can serve the best of ten assets, but if all ten point at a thin landing page or an offer nobody wants, you are just optimizing your way to the same bad result faster.
It will not screen your leads. Delivery optimization gets you cheaper clicks and cheaper form fills. Whether those fills are real people who close is a function of your creative wording, your qualifying step, and your follow-up speed, none of which live in the crop tool. If you want to stop paying twice for people you already have, that is a suppression job, and we handle it in excluding existing leads with Meta suppression lists.
And it will not choose your structure for you. The container is one decision. Whether you are scaling or testing is another, and that call is still yours to make with the ad set. Get the offer, the screening and the structure right first. The ten-asset ad is how you scale what already works, not how you find it.
Frequently asked questions
How many ads should be in an ad set on Meta?
Keep it to a handful. Meta’s delivery works best when an ad set can gather enough conversions to leave the learning phase, which unstable, over-fragmented ad sets never do (Meta Business Help). For scale, one multi-media ad holding several assets is cleaner than many separate ads, because Meta will not spread budget evenly across a stack of ads (lebesgue.io).
Can I include multiple ads in one ad set?
Yes, and it is the right move only when you are running a deliberate test, not scaling. When several ads share one ad set, Meta favors one early and under-spends the rest, so you cannot trust the comparison (lebesgue.io). A cleaner test is three to five ad sets with one ad each, so every creative funds its own read. To scale rather than test, put the variations inside a single multi-media ad and let delivery choose per placement (Meta Business Help).
Is 4:5 or 1:1 better for Meta ads?
For feed, 4:5. Meta recommends 4:5 for single-image ads in the Facebook Feed, and a taller 4:5 wins more screen than a square (Meta Business Help). Use 1:1 as your universal fallback and for the Instagram Feed. The catch is that the new crop tool will not produce 4:5, so upload a native 4:5 rather than cropping a square down (Jon Loomer).
What is the recommended creative size for Meta ads?
Build three: a 1:1 at 1080 x 1080, a 4:5 at 1440 x 1800 to clear Meta’s minimum, and a 9:16 at 1080 x 1920 or larger (Meta Business Help). Keep the important elements centered so a crop cannot cut them, and keep the edges of vertical assets clear of text and logos (Meta Ads Guide).
How is the multi-media workflow different from the old one?
The old workflow customized creative placement by placement. The new one holds up to 10 assets in a single ad, lets you customize crop, text, URL and placement per asset, and reports results per asset, which the older flexible format did not (Jon Loomer). If you need the old per-placement control back, hover the Media section and choose “Return to original single media experience” (Jon Loomer).
Multi-media ads change how your creative gets built and cropped, not whether it converts. Get the three-size set right, put your assets in one ad to scale, and keep the money elements in the center. If you would rather hand the whole build to a team that runs Meta lead-gen for a living, let’s talk about your account.
