What is the best Instagram post size?

A 1080×1350 portrait post at a 4:5 ratio occupies the most screen space in the feed, which makes it a good default. A 1080×1080 square still works and is more flexible if the same file will be reused elsewhere.

What size is a YouTube thumbnail?

A YouTube thumbnail is 1280×720 pixels at a 16:9 ratio, with a 2 MB file limit. Bear in mind it is often displayed just a few centimetres wide on a phone, so more than three or four words of text usually cannot be read.

Can one size work across every platform?

A 1080×1080 square is the safest compromise, since nearly every feed accepts it whole. For vertical video, a single 1080×1920 export serves Shorts, Reels, TikTok and Stories at once.

How often do these sizes change?

The pixel figures shift a few times a year, but the ratios rarely move. That is why this list carries the ratio on every row — if the pixel figure drifts, the ratio is still very likely correct.

SEO & Sharing

Social Media Image Sizes

Search for the size you need, copy the numbers, or download a blank canvas at those dimensions.

Search a platform, post type or ratio

What this is

A social media image size is the pixel dimension a platform displays without cropping or shrinking your image. The numbers that actually matter are few, because almost every post falls into one of four ratios: 1:1 square, 4:5 portrait, 9:16 full vertical, and 16:9 landscape. Learning those four is far more useful than memorising dozens of pixel figures, since platforms keep changing the numbers while the ratios barely move.

How it works

Export at the listed size rather than larger. An image far above the display size still gets recompressed by the platform, and that compression usually does more damage than scaling the image yourself in an editor would.

The ratio decides more than the pixel count. A 4:5 post at 1080×1350 and at 864×1080 both display whole; what causes cropping is the wrong ratio, not too few pixels. This is why one 1:1 file is safe to reuse in many places at once.

Profile pictures and banners need extra care because both are cropped differently per view. A profile picture is nearly always cut to a circle, so its corners disappear; a channel banner is cropped much narrower on a phone than on a television, so only its middle is always visible.

How to use it

Search for a platform or post type Type anything — a platform name, a post type, or a ratio.
Copy the dimensions One tap copies the width × height for pasting into your editor.
Or download a blank canvas An empty PNG at the exact size, ready to build a design on.

Common questions

What is the best Instagram post size?: A 1080×1350 portrait post at a 4:5 ratio occupies the most screen space in the feed, which makes it a good default. A 1080×1080 square still works and is more flexible if the same file will be reused elsewhere.
What size is a YouTube thumbnail?: A YouTube thumbnail is 1280×720 pixels at a 16:9 ratio, with a 2 MB file limit. Bear in mind it is often displayed just a few centimetres wide on a phone, so more than three or four words of text usually cannot be read.
Can one size work across every platform?: A 1080×1080 square is the safest compromise, since nearly every feed accepts it whole. For vertical video, a single 1080×1920 export serves Shorts, Reels, TikTok and Stories at once.
How often do these sizes change?: The pixel figures shift a few times a year, but the ratios rarely move. That is why this list carries the ratio on every row — if the pixel figure drifts, the ratio is still very likely correct.

Notes

The sizes are working recommendations and can change when a platform updates its layout.