Instagram Post Size Guide 2025: Best Dimensions & Formats

Introduction

If you're looking for the best Instagram post size, you've come to the right place! Whether you're posting square, portrait, or landscape images, getting the right Instagram post dimensions ensures that your content looks sharp, professional, and engaging.

In this 2025 Instagram size guide, we'll cover:

Instagram post size in inches & pixels
Best Instagram post dimensions for feed, Reels, and Stories
What size for Instagram posts in 2025?
Tall Instagram post size & best aspect ratios
How to optimize your content across multiple platforms

Best Instagram Post Size (2025 Updated)

Instagram Post Size in Pixels & Inches

| Post Type          | Aspect Ratio | Size in Pixels  | Size in Inches (300 DPI) |
|--------------------|--------------|-----------------|--------------------------|
| Square Post        | 1:1          | 1080 x 1080 px  | 3.6 x 3.6 inches         |
| Portrait Post      | 4:5          | 1080 x 1350 px  | 3.6 x 4.5 inches         |
| Landscape Post     | 1.91:1       | 1080 x 566 px   | 3.6 x 1.89 inches        |
| Instagram Story    | 9:16         | 1080 x 1920 px  | 3.6 x 6.4 inches         |
| Instagram Reels    | 9:16         | 1080 x 1920 px  | 3.6 x 6.4 inches         |
| Instagram Carousel | Varies       | 1080 x 1080 px  | 3.6 x 3.6 inches         |

Pro Tip: Always upload images in high resolution (1080px width minimum) to avoid Instagram compression. Instagram now supports up to 4 media files per post, with each having its own optimal dimensions.

Best Instagram Post Size Dimensions for Different Formats

Square Instagram Post Size

Recommended size: 1080 x 1080 px (1:1 aspect ratio)
Best for: General posts, product images, memes
Why? Square posts are classic and optimized for Instagram's grid layout.

Designer Tip: Square posts work exceptionally well for product photography and brand announcements as they maintain consistent dimensions in both feed and grid views.

Portrait (Tall) Instagram Post Size

Recommended size: 1080 x 1350 px (4:5 aspect ratio)
Best for: Portrait photography, personal branding, influencer content
Why? Takes up more screen space, increasing engagement & visibility.

Engagement Boost: Portrait posts typically receive 25% more engagement than square posts because they occupy more screen real estate in the feed.

Landscape Instagram Post Size

Recommended size: 1080 x 566 px (1.91:1 aspect ratio)
Best for: Wide-angle shots, travel photography, scenic views
Why? Perfect for horizontal images, but takes up less feed space.

Cross-Platform Tip: This format is closer to the 16:9 ratio used on YouTube and many other platforms, making it easier to repurpose content across platforms.

Instagram Story & Reels Size

Recommended size: 1080 x 1920 px (9:16 aspect ratio)
Best for: Stories, video content, Reels
Why? Full-screen immersive experience optimized for mobile viewing.

Video Optimization: For Reels, ensure your key content stays within the "safe zone" (centered 1080 x 1350 px area) to avoid important elements being cut off by UI elements.

Instagram Post Size FAQs (2025 Edition)

What is the best Instagram post size?

The best Instagram post size is 1080 x 1350 px (4:5) since it maximizes feed space.

What size is an Instagram post in inches?

Square post: 3.6 x 3.6 inches
Portrait post: 3.6 x 4.5 inches
Landscape post: 3.6 x 1.89 inches

What is the tall Instagram post size?

The tallest Instagram post size is 1080 x 1350 px (4:5 aspect ratio) for feed posts.
Instagram Stories & Reels use 1080 x 1920 px (9:16 aspect ratio).

What size for Instagram post in 2025?

Instagram post dimensions remain the same, but higher resolutions (4K uploads) are now supported for premium accounts.

What happens if I upload a wrong-sized image?

Instagram will resize or crop your image, which may reduce quality. Always stick to recommended Instagram dimensions.

How do I optimize images for multiple platforms?

Create a master image in the highest resolution needed, then resize for each platform. Check our Cross-Platform Sharing Guide for detailed strategies.

Instagram Post Design Tips for 2025

Image Quality & Format

Use PNG format for better quality instead of JPG
Aim for file sizes under 30MB (Instagram's maximum file size)
Consider using HEIF/HEIC formats for higher quality at smaller file sizes

Design Considerations

Optimize for mobile screens – most users browse Instagram on their phones
Use Instagram's native editing tools to align images correctly
Add text overlays & engaging captions for better engagement
Ensure text is legible – follow the 40/60 rule (text should occupy no more than 40% of the image)

Multi-Platform Optimization

Create templates that work across platforms with adjustable safe zones
Use consistent branding elements that translate well between different aspect ratios
Consider how your content will appear in both feed and profile grid views

Cuniculum Advantage: With our platform, you can automatically resize and optimize your images for Instagram and other social networks with a single click, saving hours of manual editing time.

Advanced Media Management Tips

Carousel Posts

Mix and match aspect ratios within a single carousel (all posts will display at the aspect ratio of the first image)
Use consistent styling across all carousel slides for a cohesive look
Limit to 5-7 slides for optimal engagement

Video Content

Optimal video length: 30-60 seconds for feed posts, 15-30 seconds for Reels
Maximum video file size: 650MB
Supported video formats: MP4, MOV
Frame rate: 30fps (standard) or 60fps (for action content)

Conclusion

Best Instagram post size: 1080 x 1350 px (4:5 aspect ratio) for maximum engagement.
Instagram post size in inches: 3.6 x 3.6 inches (square) | 3.6 x 4.5 inches (portrait).
Instagram Story & Reel size: 1080 x 1920 px (9:16 aspect ratio).
Always upload in high resolution to avoid compression & quality loss.

By following these Instagram size guidelines, your posts will look professional, sharp, and perfectly optimized for the platform in 2025!

Want to learn more about sharing your content across multiple platforms? Check out our comprehensive Cross-Platform Sharing Guide for strategies to maximize your content's reach and impact.