PostEaseText length
A Bluesky post is limited to 300 characters. Since that is meaningfully shorter than several other text-first platforms, a longer thought usually needs either a real edit down to its clearest point or a short chain of posts rather than one long one squeezed to fit.
Images and video
A post can include up to 4 images, each kept under the platform's current per-image size cap (2MB as of an April 2026 increase). Check in-app before a large upload, since Bluesky has raised this limit before and may again. A post can include one video, up to 10 minutes and 300MB following an August 2026 increase from the previous 3-minute, 100MB cap.
What this means in practice
The tight text limit pushes toward the same discipline that works well on Bluesky anyway: one clear, specific thought per post, with a chain of posts used deliberately for a longer idea rather than treated as a workaround.