Instagram post sizes, and how the profile grid crops them

Instagram shows posts in the feed at their own shape, but your profile grid now previews every post as a 3:4 rectangle. That means the size you pick decides both how much of the feed a post fills and how much of it survives on your profile.

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The sizes

Portrait 4:5 — 1080 × 1350: fills the most of the feed. A thin strip down each side is hidden in the 3:4 profile grid.
Portrait 3:4 — 1080 × 1440: matches the profile grid exactly, so nothing is cropped there.
Square 1:1 — 1080 × 1080: still supported, but the grid crops about 12% off each side.
Stories and Reels 9:16 — 1080 × 1920: full-screen vertical. The top and bottom are covered by the profile name, captions and reply bar.

Design tips

Keep text in the middle: leave the outer edges free so the grid crop never cuts a word.
Stories: keep text out of the top 13% and the bottom 20% of the frame.
Carousels: every slide uses the first slide’s shape, so pick one size and stick to it.

Step by step

Open the Glowtrack Studio post maker and choose Instagram portrait, square or Story from the Size menu.
Pick a template or start from a photo; the pink guides show where the grid crop or the story interface will cover your design.
Add your headline and any cut-out images, keeping them inside the guides.
Download a JPG or PNG and post it from your phone or Meta Business Suite.

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Questions

What is the best Instagram post size?

For most feed posts, 1080 × 1350 (4:5): it takes up the most space in the feed and loses only a sliver on the profile grid. Use 1080 × 1440 (3:4) if the grid look matters most.

Will Instagram compress my image?

Yes, a little. Uploading at exactly 1080 pixels wide avoids an extra resize and keeps it sharpest.

Can I change the grid crop?

Yes — when posting or editing, you can adjust the profile grid preview. Keeping important content central saves you the trouble.