A Reel filmed in the wrong shape gets cropped, blurred or letterboxed, and viewers decide in the first second whether to stay. The technical specs are not glamorous, but they are the difference between a Reel that looks professional and one that looks accidental. Instagram's own guidance is simple: film vertical, keep your subject in the safe area, and export at the right resolution. This guide gives you every number you need for Reels in 2026, and explains the mistakes that ruin otherwise good videos.

Instagram Reels are vertical video with a 9:16 aspect ratio, and the recommended resolution is 1080 pixels wide by 1920 pixels tall. That is the size of a phone screen held upright, and it is the size you should export every Reel at. Filming in 1080 by 1920 keeps your video sharp after Instagram's compression, and it fills the whole screen, which is exactly what the format is designed for. Horizontal video gets shrunk into a small strip with empty space above and below, and viewers scroll past it without a second thought.

If you film in 4K on your phone, that is fine, and it gives you extra quality to work with when you crop or zoom in editing. But your final export should still be 1080 by 1920, because Instagram displays Reels at that size and compresses larger files anyway. Exporting at a higher resolution does not make your Reel look better on Instagram, it only makes the upload slower. Keep your frame rate at 30 frames per second for normal Reels, and use 60 only for slow-motion shots, because the file size doubles and the visual difference is small on a phone screen.

The safe zone is the area of your Reel that is never covered by Instagram's interface, and it is where your text and your subject belong. The top of the screen is covered by the profile bar and the Reel controls, and the bottom is covered by the caption, the like and comment buttons, and the audio label. As a practical rule, keep important text and faces inside the middle 70 to 80 percent of the frame, leaving roughly the top 15 percent and the bottom 20 percent clear. Anything outside that zone risks being hidden behind a button.

This matters most for captions and on-screen text. A caption placed at the very bottom of the frame will sit behind the caption text and the action buttons, and a headline at the very top will clash with the profile bar. Before you publish, preview the Reel on your phone and check that every word is readable with the interface visible. One useful trick is to add your text in your editing app with generous margins, then check the preview twice: once in the editor and once in Instagram, because the two previews are not identical.

Instagram Reels can now be up to 3 minutes long, but length is a creative choice, not a target. Most high-performing Reels are 15 to 30 seconds, because short videos are more likely to be watched to the end, and completion rate is one of the strongest signals Instagram uses. A 90-second Reel only works if every second earns its place, so cut ruthlessly and make your point early. If your Reel needs more time, consider splitting it into a series instead of posting one long video.

Keep your file size reasonable: a 30-second Reel at 1080 by 1920 and 30 frames per second is usually 20 to 50 megabytes, which uploads quickly on any connection. Avoid the most common mistakes: filming horizontally, exporting at low resolution, placing text at the edges, and uploading a video with black bars. Each of these makes the algorithm's job harder and the viewer's experience worse. Get the specs right once, save them as a preset in your editing app, and you will never have to think about them again.

Film vertical at 1080 by 1920, keep text in the middle of the frame, and aim for 15 to 30 seconds. Save those specs as a preset, and every Reel you make will look like it was made on purpose.