Facebook ads run across multiple placements — feed, Stories, Reels, Marketplace — each with a different preferred aspect ratio and different UI elements overlapping the creative. Designing around a single fixed size for every placement is one of the most common reasons ad creative gets cropped or covered awkwardly.
Square format is a reliable, broadly compatible choice across feed placements on both desktop and mobile, since it displays at a consistent size without significant cropping in most feed contexts. It's a reasonable default when running one creative across multiple placements without building separate versions for each.
A 4:5 vertical ratio takes up more vertical space in a mobile feed than a square image, which generally means more screen real estate and attention as someone scrolls past. This ratio works well for feed placements specifically but isn't as tall as the format Stories and Reels expect.
Stories and Reels placements expect a full-screen vertical 9:16 ratio. Using a square or 4:5 image here typically results in visible bars or a cropped, zoomed-in version of the image that loses composition control — building creative natively in 9:16 for these placements avoids that problem entirely.
Regardless of ratio, leave margin around the edges of the frame — profile names, captions, call-to-action buttons, and interactive elements like the Stories reply bar or Reels like/comment icons typically sit near the top and bottom or right edge of vertical placements. Keep essential text and product detail centered and away from those regions so nothing important gets covered.
Better use of screen space and attention across each placement type
Avoids cropped or padded creative in Stories and Reels
Protects key text and branding from being covered by platform UI
Upload your product photo to Fluxx.work.
Generate ad-ready creative in square, 4:5, and 9:16 formats.
Export placement-specific versions ready for Facebook Ads Manager.
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You can, but it won't perform as well in Stories or Reels, where a square image gets cropped or padded rather than filling the full vertical frame — building placement-specific creative generally performs better where the budget allows it.
Key text, logos, or product details can end up hidden behind UI elements like the profile name, caption text, or interactive buttons that Facebook overlays on Stories and Reels placements.
Square (1:1) is the safest single choice for broad feed compatibility, but if Stories and Reels are a meaningful part of the campaign's placement mix, a 9:16 version is worth the extra effort.
Fluxx.work exports the same product image across multiple ad-ready aspect ratios, so each Facebook placement gets a properly composed version instead of a stretched or cropped square.
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