Facebook Ads Image Size Specifications: Avoiding Common Mistakes in Ad Design

When marketers ignore Facebook Ads image size specifications, their ads often fail before they even start. In this article, I’ll show you how to avoid the most common image sizing mistakes that hurt performance. Whether you’re just starting or managing multiple campaigns, this guide will help you clean up your creatives and drive better results. Keep reading so your next ad doesn’t get skipped or disapproved.

Mistake 1: Using the Wrong Aspect Ratio

One of the biggest mistakes I see is using the wrong aspect ratio for the ad placement. Facebook offers several placements—Feed, Stories, Reels, Marketplace—and they don’t all use the same format.

Quick guide to correct aspect ratios:

• Feed Ads: 1:1 or 4:5

• Stories & Reels: 9:16

• Right Column Ads: 1:1

• Video Thumbnails: 16:9 or 1:1

What goes wrong when you use the wrong ratio?

• Facebook crops your image

• Your message or CTA disappears

• The ad looks broken or incomplete

Solution:

Design with the final placement in mind. Use design tools that allow custom aspect ratios. Don’t upload one generic image for all formats—it won’t fit properly.

Mistake 2: Ignoring Facebook’s Image Compression

Facebook automatically compresses your ad images to save bandwidth. If you upload a low-quality image, it becomes even worse after compression.

Common issues:

• Blurry visuals

• Pixelated text

• Washed-out colors

Recommended image specs:

• Resolution: at least 1080 x 1080 px

• File size: under 30MB

• File type: PNG for graphics, JPG for photos

What’s the fix? Start with high-resolution exports. Avoid screenshots, WhatsApp-forwards, or compressed downloads. Export your final image from your design software with "maximum quality" settings.

Mistake 3: Overloading Images with Text

Even though Facebook dropped the strict 20% text rule, too much text on an image still ruins the ad.

Why it’s a problem:

• It looks spammy

• It gets ignored by viewers

• It lowers engagement and relevance score

Keep your image clean:

• 1–2 short lines of copy

• Bold fonts only

• Stay inside the safe zone (center 80% of the image)

If you have a lot to say, say it in the ad copy—not the image. Your creative should attract attention visually, not overwhelm with information.

Pro tip:

Run your image through Meta's Text Overlay Tool to check its balance, even if enforcement is soft.

Facebook Ads image size specifications are more than technical guidelines—they protect your campaign from common design errors. Avoid bad aspect ratios, low-res files, and text overload to give your ads the best chance at success. These three mistakes are easy to fix and even easier to prevent. Stick with KTM Ads Agency for more expert tips on creative strategy and campaign design.

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