Posting Photos on Instagram in 2021!

Knowing the best size and dimension for every Instagram post is no mean feat. In this blog, you’ll find all the dimensions you need to create perfectly-sized images for Instagram Posts.

Understanding Instagram Image Size & Aspect Ratio

When sharing photos and videos on Instagram, there are two main things to keep in mind: aspect ratio and size. 

Aspect Ratio

Aspect ratio refers to the width of a picture to its height. It’s expressed as a ratio, like 4:5 or 9:16, where the first digit represents the width and the second digit represents height.

It’s essential to make sure your photos and videos fall within Instagram’s aspect ratio guidelines. Otherwise, they’ll be cropped to fit a supported ratio — which could result in part of your image being lost.


Size (or resolution) refers to the number of pixels that make up your photo’s width and height. Like aspect ratio, size is expressed by two numbers, the first representing width and the second representing height.

For example, an image size of 1080px x 1080px is much larger than one sized 50px x 50px.

So does image size on Instagram even matter?

Yes! Even though Instagram compresses your photos, it’s always better to share at an optimal resolution. That way, when Instagram compresses your photo, it won’t affect the image quality.

Note: You should still try to avoid posting photos with an ultra-high-resolution, like 5400px by 5400px. Doing so could negatively impact your image quality.

Instagram Size Guide: Instagram Feed Posts

Once upon a time, Instagram feed posts were limited to the simple square, but now (almost) anything goes.

Square Posts (1:1)


Although Instagram supports horizontal and vertical photos, square posts continue to be a popular choice on Instagram – especially as the Instagram profile grid crops content to a 1:1 ratio.

So how do you optimize for square?

We recommend making your square photos 1080px by 1080px in size. That way, when Instagram compresses the file, the version will still be high quality.

Horizontal Posts (16:9)

While Instagram recommends an aspect ratio of 1.91:1, you can go as far as 16:9.

In any case, we recommend you make the height of your horizontal photo at least 1080px. That way, when Instagram compresses the file, the quality should remain pretty high.

Vertical Posts (4:5)

Generally speaking, your vertical photos should have an aspect ratio of 4:5. Anything longer (like 4:6 or 4:7), and Instagram will crop your content. As for size, we recommend going with 1080px by 1350px. That way, when Instagram compresses the photo, it should be displayed at around 480px by 600px.

Instagram Carousel Posts

Instagram carousel posts can be square, horizontal, or vertical in format and include both photos and videos.

However, once you’ve selected your first photo or video, all of the following images you choose will be cropped to the same aspect ratio. If the first photo you select is square, all of your following content will be cropped to a 1:1 format.


Posting Tip:

The last thing to mention, and arguably the most important, is that Instagram automatically formats a post as a 1:1 square. To take advantage of posting the portrait or landscape formats, you will need to zoom out on the frame before posting.