The Facebook Story size (1080×1920px)
Facebook Stories are vertical and full-screen, so 1080x1920 pixels at 9:16 is the size that fills the display without bars or forced zoom. This is the same aspect ratio as Instagram Stories, which makes it easy to reuse a single design across both of Meta's platforms.
As with any full-screen Story, interface elements sit on top of your image. Facebook places the profile name and controls near the top and the reaction and reply bar along the bottom, so roughly the top 250 pixels and bottom 250 pixels should be treated as reserved. Content in those bands risks being covered.
Facebook Stories skew toward a broad, general audience that spans older demographics than some other platforms, so clarity beats cleverness. Keep messaging large, centered, and high-contrast so it reads at a glance before the Story auto-advances. If you plan to add a link sticker or Shop tag, leave room in the middle where those interactive elements typically appear.