Best Size for Instagram Video Ads: The Ultimate Guide to Perfect Dimensions

Instagram video ads are one of the most effective ways to grab attention and drive conversions — but to get the best results, your video needs to be formatted just right. Using the correct video dimensions ensures your ad looks sharp, fills the screen properly, and avoids getting cropped or distorted. In this post, we’ll break down the best size for Instagram video ads across all placements and help you optimize every pixel.

Best Video Sizes by Instagram Ad Placement

Instagram has multiple ad formats, each with its own ideal size:

1. Instagram Feed Video Ads

• Recommended Size: 1080 x 1080 px (square) or 1080 x 1350 px (portrait)

• Aspect Ratio: 1:1 or 4:5

• File Type: MP4 or MOV

• Max Length: Up to 60 seconds

Tip: Portrait (4:5) generally performs better as it fills more vertical space.

2. Instagram Stories Ads

• Recommended Size: 1080 x 1920 px

• Aspect Ratio: 9:16

• Max Length: 15 seconds per Story (can string multiple for longer videos)

Tip: Keep key visuals and text centered—avoid placing text too close to the edges where UI elements appear.

3. Instagram Reels Ads

• Recommended Size: 1080 x 1920 px

• Aspect Ratio: 9:16

• Max Length: Up to 90 seconds

Tip: Use full-screen vertical video with music or voiceover, and include text overlays for sound-off viewers.

4. Instagram Explore Ads

• Recommended Size: 1080 x 1080 px or 1080 x 1350 px

• Aspect Ratio: 1:1 or 4:5

• Max Length: Up to 60 seconds

Tip: Use bold thumbnails and strong hooks in the first few seconds to stand out.

Why Using the Right Video Size Matters

• Better Engagement: Properly sized videos look native and polished, encouraging more views and taps.

• No Cropping Issues: Avoid losing important content or visual clarity.

• Improved Performance: Ads with the right aspect ratio often have higher click-through and view-through rates.

Final Tips for Instagram Video Ads

• Always use vertical video (9:16) for Stories and Reels.

• Use high-resolution exports (1080p minimum).

• Add captions or text overlays for accessibility and engagement.

• Keep your message clear in the first 3 seconds.

 Conclusion

Getting the best size for Instagram video ads is more than just a formatting task — it’s a performance strategy. By tailoring your videos to fit each placement perfectly, you’ll improve user experience, boost ad performance, and make every second count.