Instagram Grid Preview Change, Explained
Instagram moved its profile grid preview from square (1:1) to portrait (4:5). Upload at 1080 × 1350 px so your posts fill the new grid without a center-crop.
Instagram head Adam Mosseri announced the change in early 2025. The profile grid — the 3-column view of your posts — now previews every post at 4:5 portrait instead of the 1:1 square that had been the standard since 2011.
What that means in practice: portrait uploads (1080 × 1350 px) fill the grid preview perfectly. Square uploads (1080 × 1080 px) get center-cropped to 4:5 in the grid, so roughly the top and bottom 15% is trimmed in the profile view — the post itself still displays as a square in-feed.
Source: Instagram Help Center — post specs
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What actually changed
Old grid: every post displayed as a 1:1 square in the profile grid, matching how it displayed in the feed.
New grid: every post displays as a 4:5 portrait in the profile grid. Square posts get center-cropped; portrait posts fit perfectly.
Feed display is unchanged. Only the profile grid preview crops differently now.
What to do about it
New posts: upload at 1080 × 1350 px (4:5). This has been Instagram's best-performing feed size for years already, and it now doubles as the perfect grid-preview size.
Existing posts: nothing you can do without deleting and re-uploading. If a specific post looks wrong in the crop, you can archive it. Otherwise, leave the grid to catch up as you post new 4:5 content.
Grid-planning apps: if you use a tool that previews your grid, make sure it's showing the 4:5 preview, not the old 1:1 one.
Frequently asked questions
What changed with the Instagram grid?
Instagram moved profile grid previews from 1:1 squares to 4:5 rectangles. Existing square posts now display cropped in the grid — the top and bottom get trimmed to fit the taller preview.
Do I need to resize my old Instagram posts?
No — you can't retroactively resize a published post. Instagram simply crops old squares to fit the new grid. You can archive posts you dislike the crop of, but there is no way to re-upload without deleting.
What size should I upload to Instagram now?
Upload at 1080 × 1350 px (4:5 portrait). This matches both the new grid preview and Instagram's preferred in-feed size, so one file works for both.
Will my existing grid look different?
Yes. Square posts published before the change now show a center-crop in the grid, with roughly the top and bottom 15% trimmed. In-feed the posts still display in their original square ratio.
Does this apply to Reels and Stories?
No — the change only affects the profile grid preview for feed posts. Reels covers still use 1080 × 1920 px (9:16), and Stories are unaffected.
Where did Instagram announce this?
Instagram head Adam Mosseri announced the grid preview change on Instagram in early 2025. Instagram's official Help Center covers current post specs, and the tall-preview crop behavior is described in Instagram's creator-facing guidance.