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Learn how to format your Instagram Reels with the correct dimensions, ratios, and lengths for optimal quality and visibility. Find tips on cover, thumbnail, frame, and compression sizes, as well as caption length and aspect ratio. Learn the best Instagram Reel size with exact ratio, spec, format, etc. to ensure your videos look sharp, fit perfectly, and perform well across the platform. You can use Reels to show off your products, services, team, and what goes on behind the scenes at your business. If you’re a personal brand, you can use Reels to speak directly to your audience. The Exact Dimensions of Instagram Reels To make your Reels the perfect size for Instagram, they should be 1080px x 1920px with a 9:16 aspect ratio. Find the optimum Instagram post sizes for 2025 with our complete guide, including photos, videos, reels, and grid guidelines.