Bluesky Banner and Avatar Size 2026

The Bluesky banner size is 3000x1000 pixels at a 3:1 aspect ratio, and the Bluesky avatar size works best at 1000x1000 pixels, displayed as a circle across the app. Both images sit under a roughly 1MB file size limit, so a banner exported straight from a photo editor can sometimes need compressing before it uploads cleanly.

Bluesky avatar size

Upload a square image at 1000x1000 pixels for a sharp result whether the avatar shows tiny in a reply thread or full size when someone taps your profile. Bluesky crops avatars into a circle, so keep your subject or logo centered. A 400x400 image is the practical floor that still renders acceptably, but anything smaller starts to look soft.

Bluesky profile banner dimensions

The banner sits behind your avatar and name at the top of your profile. At 3000x1000 pixels (3:1), you have room to work with, but a smaller 1500x500 export at the same ratio still looks sharp for most screens if you want a lighter file. Two things to design around:

• Mobile crop: mobile devices crop the banner slightly tighter on both sides than desktop does, so keep important text or faces away from the far left and right edges.
• Avatar overlap: your profile picture sits over the bottom left corner of the banner on most layouts, so avoid placing text or a logo directly behind where the avatar will land.

Quick reference

Element	Recommended size	Ratio	File limit
Avatar	1000x1000px	1:1	~1MB
Banner	3000x1000px	3:1	~1MB

Common mistakes worth avoiding

The most frequent avatar mistake is uploading a rectangular headshot or logo lockup that was cropped for a platform without a circular mask, like LinkedIn or a website favicon. What looks balanced in a square frame often shifts off center once Bluesky rounds the corners away, clipping a logo's edge or pushing a face too close to one side. Preview the circular crop before publishing rather than assuming a square upload will look the same as it does in your editor.

For banners, the most common issue is text placed too close to either edge, which then gets trimmed on mobile's tighter crop. If your banner includes a tagline, a handle, or contact information, keep at least 10 to 15 percent of margin on the left and right sides so it survives every device.

Setting it up

Both images upload from the same profile edit screen in the Bluesky app: tap your avatar, choose edit profile, and you will see separate upload buttons for avatar and banner. If you manage Bluesky alongside other platforms, keep your branding consistent by reusing the same avatar crop everywhere and resizing it per platform with a tool like the social media image resizer, then schedule your first posts through the Bluesky scheduler once your profile is set up. Create a free account to manage Bluesky alongside the other nine platforms Posted Once supports.