Instagram Reels Dimensions 101 | Size & Formatting Guide (2026)

Master your content with our Instagram reels dimension guide. We share the suggested reel resolution, aspect ratio and length for top-quality videos.

Last Updated: December 19, 2025
8 min read
Reviewed by Ortal Hadad

Research shows 35.4% of total Instagram likes are attributed to Reels content. Clearly, it’s time you include them in your content strategy.

But before you start, we suggest taking the time to understand Instagram Reels requirements. This will leave your content looking best and ensures you don’t have issues uploading or viewing your content smoothly.

Read on if you’re wondering what you need to know about Instagram Reels dimensions and other formatting guidelines. Here is your comprehensive Riverside guide to all the basics.

Why does the size of your Instagram Reels matter?

The Instagram app supports specific dimensions and content types. By aligning with the rules, you ensure your content remains shareable on Instagram.

But it’s also about how you appear to your audience. By following Instagram guidelines, your content appeals professional and you’ll deliver a better viewing experience for your viewers.

Instagram Reels dimension requirements for 2026

There are a few Instagram Reel dimension requirements to be aware of before sharing video content on the app. Following these guidelines will ensure you give your audience the best viewing experience without worrying about technical issues.

Reels resolution

Currently, the minimum video resolution for Instagram Reels is 720 pixels, and the maximum is 1080 pixels. Videos with a resolution that is too low, below 720 pixels, are not available in high definition. A resolution that is too high, above 1080 pixels, is unsuitable, as Instagram compresses higher-resolution clips to reduce file size.

Reels aspect ratio

The ideal aspect ratio for Instagram Reels is 9:16. This aspect ratio fills an average user’s mobile screen, which is in line with the way that most users consume Instagram Reels content.

Reels cover or thumbnail

When sharing an Instagram Reel, you can select a cover image from your video frames or upload an existing image from your camera roll to act as a thumbnail. This displays before your video begins or when automatic playback is not available.

Reels length

Instagram Reels can now be up to 90 seconds in length. However, shorter videos are often very successful, with many users sharing clips that are only a few seconds long and achieving great reach or even viral content based on these.

What to keep in mind with Instagram Reels dimensions

While working within Instagram Reels dimensions is important, there are also several other factors you need to consider if you want to maintain premium content quality and achieve the best results for your account.

Text-blind spots

When applying text or subtitles to Instagram Reels footage, remember that Instagram obscures some parts of the screen in feed display. It’s usually best to place text elements well within frame, towards the middle of the screen, and away from the edges.

Vertical video

Instagram Reels display vertically on the user’s screen with automatic playback. This approach is optimized for mobile viewing. For the best impact, we suggest creating content that aligns with Instagram’s vertical playback design.

Varying dimensions

Your Instagram Reels will use different dimensions depending on where they appear on the app. In full-screen mode, Reels will appear with a 9:16 aspect ratio. On the feed, viewers may only see the 4:5 portion of your video, and on the grid, your thumbnail will appear as 1:1.

Best practices for Instagram Reels sizing

Feeling overwhelmed by the prospect of navigating Instagram Reels sizing requirements? Don’t panic! Just keep these things in mind to help you stay on track throughout the process.

Prioritize quality

Great quality can make a big difference in the overall professionalism of your Instagram account!

Check the specs

Before producing a video for Instagram Reels, refresh your knowledge to ensure you’re planning the right way!

Use presets

Automated tools like Riverside can help you create Instagram-suitable content quickly and easily.

Replay and review

Replay and review your Instagram Reels content before publishing it on the app to ensure that your video is working in line with optimal dimensions.

FAQs on Instagram Reels dimensions

Are Instagram Reels 4x5?

Typically, Instagram Reels have a 9:16 aspect ratio. However, a 4:5 aspect ratio may show for users who view your content in the feed instead of launching full-screen Reels viewing.

What format are Instagram Reels videos?

Instagram currently accepts video uploads that use either an MP4 or MOV file type. These formats allow for easy, high-speed uploading without stripping detail and compromising the quality of your final video projects.

Final thoughts

By planning ahead to stay in line with Instagram dimensions guidelines, you can achieve the best results for your Reels and do better for your overall Instagram strategy.