The most common aspect ratios used on Instagram are 1:1 for square, 4:5 for portrait, and 16:9 for landscape. Instagram Aspect Ratio & Instagram Photo Size. 1. Instagram Post Frame Size & Aspect Ratio. Square Posts. For optimal square posts, aim for dimensions like 1080px by 1080 px, and the aspect ratio is 1:1.
The ideal size for square Instagram images is 1080px by 1080px at a 1:1 aspect ratio. For vertical images, the ideal size is 1080px by 1350px at an aspect ratio of 4:5. For landscape images, the ideal size is 1080px by 566px with an aspect ratio of 1.91:1.
Every kind of Instagram post has an exact aspect ratio that works best for it. Here's a full guide to Instagram's post size requirements, and how to edit your photos to match them.
Download the official Instagram app for Windows and access your profile, post new content, and see what other users are sharing. You can also send messages, explore suggested posts, and adjust the size and aspect ratio of your posts.
What is the Best Aspect Ratio for Instagram Posts? The best aspect ratio for Instagram posts is either 1:1 (square), 1.91:1 (landscape), or 4:5 (portrait). Here's a handy chart of IG post size and resolution at the 3 proportions.
Aspect ratio options for Instagram posts are 1:1 (square), 1.91:1 (landscape, or wide), or 4:5 (portrait, aka tall). In 2025, 4:5 is the BEST aspect ratio for Instagram posts. Here's a handy chart of best IG post size and resolution at the 3 proportions.