Bluesky banner size
3000 × 1000px
Aspect ratio
3:1
Bluesky banners are 3:1 — upload 3000 × 1000 px for maximum sharpness (1500 × 500 px works at the same ratio).
Last verified June 2026
The Bluesky profile banner spans the top of your profile at a wide 3:1 aspect ratio. Bluesky doesn’t publish a single official pixel figure, but 3000 × 1000 px is the commonly recommended upload for sharp rendering on high-density screens, and 1500 × 500 px — the same ratio — also displays cleanly. The shape will feel familiar to anyone coming from X or Mastodon, which makes one well-designed 3:1 master reusable across all three.
| Variant | Dimensions | Ratio |
|---|---|---|
| Recommended upload | 3000 × 1000 pxCommonly recommended size — Bluesky publishes no official number. | 3:1 |
| Lighter alternative | 1500 × 500 pxSame ratio at half resolution; fine for simple designs. | 3:1 |
| Display crop | variesExact visible area shifts slightly between web, iOS, and Android layouts. | ~3:1 |
The circular avatar overlaps the banner’s bottom-left on profile pages, and mobile layouts shave the banner’s outer edges slightly compared to web. Keep text and logos inside the central 60% horizontally and the upper two-thirds vertically — the bottom-left quadrant in particular belongs to the avatar. A centered composition with breathing room survives every client, including third-party Bluesky apps that crop differently.
A banner is read in under a second while someone decides whether to follow. The formats that work: a tagline in large type (“Daily UI breakdowns”), a product hero shot, or a clean brand pattern. The format that fails: a collage of everything you do. Pick the single message that best frames your posts, because the banner is the context your bio gets read in.
Between the avatar overlay bottom-left, varying mobile crops, and rounded UI elements, all four corners are unreliable real estate. Design on a 3000 × 1000 canvas with guides at 20% from each edge and keep type inside them. If the design must bleed, let only texture and color bleed — never words.
X headers and Mastodon headers are also 3:1, so one banner master can serve all three accounts. The check before you reuse: each platform overlays its avatar in a slightly different spot. If your composition is center-weighted with empty lower corners, it ports perfectly and your profiles stay visually consistent wherever people find you.
A 3:1 ratio — 3000 × 1000 px is the commonly recommended upload, and 1500 × 500 px works at the same ratio. Bluesky publishes no official figure, so the safe play is the ratio plus a centered design.
Mobile layouts trim the banner’s edges slightly compared to the web profile, and the avatar overlaps the bottom-left. Keep text inside the central 60% of the canvas and it will read everywhere.
Yes — all three use a 3:1 header, so one master file ports cleanly. Just confirm nothing important sits in the bottom-left, where Bluesky’s avatar overlay lands.
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