TL;DR: Instagram vertical ads use two core formats: 4:5 for Feed and 9:16 for Stories and Reels. Match the spec to the placement, respect the safe zones, and you claim more mobile screen than any other format. Coinis Smart Resize adapts one design to both without manual rebuilding.
Understanding Instagram Vertical Ad Formats
Vertical ads fill more of the mobile screen than any other format. That means more visual impact and more attention from the people you're targeting.
What counts as a vertical ad on Instagram
A vertical ad is taller than it is wide. On Instagram, that means an aspect ratio of 4:5 or 9:16. Square (1:1) and landscape (1.91:1) formats are not vertical. If your ad isn't taller than wide, you're leaving screen space unused and ceding visual impact to competitors who are.
Where vertical ads appear (Feed, Stories, Reels)
Instagram supports vertical ads across three main placements. Feed accepts the 4:5 ratio. Stories and Reels take 9:16. You can run both in a single campaign. You just need the right asset for each placement, which is where format planning matters.
Why vertical formats drive better mobile engagement
Mobile screens are tall. Vertical formats fill them. Square and landscape ads leave blank margins above and below the creative. Those empty gaps reduce visual impact and signal to the viewer that your ad was designed for desktop, not for them. A 4:5 Feed ad claims more scroll real estate than a square post. A 9:16 Stories ad owns the full screen. More screen means more attention.
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Vertical Ad Specs by Placement
Getting the specs right prevents creative rejection and avoids blurry rendering on device.
Instagram Feed vertical ads (4:5 aspect ratio)
Per Meta's Ads Guide, Instagram Feed vertical image ads use a 4:5 aspect ratio. The recommended resolution is 1440 x 1800 pixels. Minimum width is 500 pixels. Accepted file types are JPG and PNG. Maximum file size is 30MB. Primary text is capped at 125 characters. Stay within these numbers and your ad renders cleanly on all modern devices.
Instagram Stories ads (9:16 aspect ratio)
Meta's Ads Guide specifies a 9:16 aspect ratio for Stories image ads. The recommended resolution is 1440 x 2560 pixels. The same file rules apply: JPG and PNG up to 30MB. Primary text stays under 125 characters. Stories take over the full screen, so resolution matters more here than in any other placement. Blurry assets are more noticeable and more damaging to performance.
Safe zones for text and logos on vertical ads
Stories ads have strict safe zones. Keep the top 14% of the frame, roughly 250 pixels, free from any text or logo. That area shows the profile icon and ad label. Keep the bottom 20% of the frame, roughly 340 pixels, free as well. That's where the CTA button renders. Anything placed inside those zones gets covered. Center your key visual and core message in the middle portion of the frame where the viewer's eyes actually land.
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Design Tips for Vertical Ads
Correct specs get your ad approved. Smart design makes people stop scrolling.
Use high-quality visuals optimized for mobile
Start at the recommended resolution for your placement: 1440 x 1800 for Feed and 1440 x 2560 for Stories. Low-resolution images look blurry on modern phone screens, especially at full screen on Stories. Choose visuals that fill the vertical frame with your subject. Avoid wide-angle shots that leave empty space at the sides. Your product or person should dominate the frame and draw the eye immediately.
Test text placement and readability
Keep primary copy under 125 characters. That's the platform limit and it's also just good practice for mobile. Shorter copy gets read. Place your headline and CTA inside the safe zone where they're guaranteed to display. Use high-contrast text over your background: light text on dark, or dark text on light. Avoid text blocks that cover the product or hero visual. Clean and readable beats dense and clever every time.
Create multiple aspect ratios for multi-placement campaigns
Running one format limits your reach. A 4:5 Feed asset gets awkwardly cropped if pushed to Stories. A 9:16 Stories asset doesn't sit right in Feed. Build for both placements from the start. Design your primary creative, then adapt it to the second format. Or generate both at the same time and launch across all placements from day one.
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How Coinis Revise Helps Build Vertical Ads
Coinis Revise handles the format-adaptation step so you don't resize manually.
Use Smart Resize to adapt designs across vertical formats
Smart Resize takes your existing ad creative and outputs it in multiple aspect ratios. Convert a 4:5 Feed creative into a 9:16 Stories asset in one click. The tool repositions elements to fit the new frame without manual cropping or layout rebuilding. If you're starting from scratch, the Image Ads workflow generates vertical creatives directly from a product URL. Pick your placement upfront and get the right dimensions from the start.
Test variations with Variate for engagement optimization
Variate generates multiple creative angles from a single design. Run three or four vertical variants in the same campaign. Test different visuals, color treatments, and text placements against each other. Cut what underperforms. Scale what works. You get real data instead of gut-feel guesses, and you spend less time building new creatives from zero every time you want to test.
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Or skip the steps.
Coinis Revise edits any ad image with AI. Move text. Change text. Swap colors. Erase objects. Translate to any language. One click each.
No design skills. No Photoshop. One click.
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Frequently Asked Questions
What is the best aspect ratio for Instagram vertical ads?
It depends on placement. Use 4:5 (1440 x 1800 px) for Instagram Feed and 9:16 (1440 x 2560 px) for Stories and Reels. Both fill more mobile screen than square or landscape formats.
What are the safe zone requirements for Instagram Stories ads?
Per Meta's Ads Guide, keep the top 14% (roughly 250 px) and bottom 20% (roughly 340 px) of your Stories creative free from text and logos. Those areas are covered by the profile icon and CTA button.
Can I use the same creative for both Feed and Stories placements?
Not directly. Feed uses 4:5 and Stories uses 9:16. Running the wrong ratio means cropping or empty space. Resize each creative to match the placement, or use a tool like Smart Resize to adapt in one click.
What file types and sizes does Instagram accept for vertical ads?
Instagram accepts JPG and PNG files up to 30MB for both Feed and Stories vertical image ads. Minimum width is 500 pixels. Recommended resolutions are 1440 x 1800 px for Feed and 1440 x 2560 px for Stories.