Is 4x5 the same as 1080x1350?

Is 4x5 the Same as 1080x1350?

If you've been scrolling through Instagram and wondered about the best size for your feed posts, you're not alone. The short answer? Yes, 4x5 is essentially the same as 1080x1350 pixels when it comes to aspect ratio and recommended format.

Here's how it breaks down: 4x5 refers to the aspect ratio—meaning for every 4 units of width, there are 5 units of height. When applied to pixels, Instagram’s ideal vertical post size is 1080 pixels wide by 1350 pixels tall. That’s where the 4:5 ratio comes to life in real-world use. So while 1080x1350 is the exact resolution, 4x5 describes the shape.

Why does this matter? Because Instagram recommends this 4:5 aspect ratio for feed posts to ensure your photos and videos display beautifully without awkward cropping or borders. A 1080x1350 image fills more of the screen, especially on mobile, giving your content a clean, immersive look.

Posting in this format means your visuals stand out—no wasted space, no automatic zooming, just crisp, full-height images. Whether you're sharing portraits, flat lays, or styled photography, sizing it right from the start makes a noticeable difference.

Of course, Instagram supports other formats—like square (1:1) or horizontal (16:9)—but for maximum impact in the feed, sticking to 4:5 (or 1080x1350px) is your best bet. It’s not just about fitting the frame; it’s about making your content feel intentional and professional.

So next time you’re prepping a post, remember: 4x5 isn’t just a number—it’s the key to unlocking a more polished, engaging Instagram presence.