Instagram carousel size, exactly

There are two right answers in 2026. 3:4, at 1080 × 1440 pixels, is the tallest a photo post can go, natively supported since Instagram's May 2025 update, and it matches the profile grid's 3:4 tiles exactly, so nothing crops there. 4:5, at 1080 × 1350, is the long-standing classic, the default most design and scheduling tools still export, and the ceiling for video slides.

The full picture has more options and two traps: the first slide's ratio is forced onto every other slide, and the profile grid previews everything as 3:4 tiles, which shaves the sides of 4:5 and square designs. The preview below shows both before you post.

Instagram carousel sizes at a glance

The first slide decides the ratio for every slide

Whatever ratio your first slide uploads at, Instagram crops every following slide to match it. Mixing a 4:5 cover with square interior slides does not give you a mixed carousel; it gives you cropped interior slides. Design the whole set at one ratio, and check slide edges before posting, because the crop centers itself and trims top and bottom.

This is also why the size question has a short practical answer. Photo-led set: 3:4, the tallest option, and your profile grid shows it uncropped. Mixed or video-heavy set, or a template that exports 4:5: 4:5 remains completely standard. The set just has to agree with slide one either way.

The grid crop: why your covers look cut off on your profile

Profile grids display posts as 3:4 tiles. A 4:5 slide is shorter than 3:4 is tall, so the grid shows a center crop with the outer left and right shaved; a square slide loses more. If your cover slides carry text near the edges, the grid version can amputate it.

Two clean fixes: design at 3:4 (1080 × 1440) so the grid shows your slides exactly as designed, or keep all critical text inside the center of a 4:5 cover so the shave is cosmetic. The preview tool above overlays the actual 3:4 window on your chosen ratio so you can see what survives, with no guessing.

Resolution, files, and what actually degrades quality

Instagram displays feed images at up to 1080 pixels wide and re-compresses everything on upload. Upload at exactly 1080 wide (not 4K, which invites heavier recompression, and not 640, which looks soft), export JPEG around 80–90% quality or PNG for flat graphics, and keep files well under Instagram's 30 MB image cap, which real exports never approach.

Text is what suffers first when sizes are wrong. If your slides are text-led, sharpness at 1080 wide matters more than any other setting; that is why every template in Virallized AI renders at 1080 × 1350 natively rather than scaling something else down.

Common questions

What size should an Instagram carousel be in 2026?

Two current answers: 3:4 (1080 × 1440) is the tallest photos can go, native since Instagram's May 2025 update, and it matches the profile grid exactly. 4:5 (1080 × 1350) is the long-standing classic most tools export and the ceiling for video slides. All slides follow the first slide's ratio.

How many slides can an Instagram carousel have?

Up to 20 photos or videos in one post since Instagram expanded the old 10-slide limit. Most carousels read best well under that; use the room when each slide earns its swipe.

Can I mix photos and videos in one carousel?

Yes, in any combination up to 20 slides. Video slides can each run up to 60 seconds, and every slide is cropped to the first slide's aspect ratio.

Why does my carousel look cropped on my profile grid?

The grid previews posts as 3:4 tiles, which is taller than 4:5 and much taller than square, so the sides of your design get shaved in the grid view. Design covers at 3:4 or keep key text centered.

Is 4:5 or 3:4 better for carousels?

For photo-led carousels, 3:4 (1080 × 1440): it is taller in feed and the profile grid displays it with zero crop. 4:5 (1080 × 1350) stays the right call for video slides and for templates or tools that export 4:5; it is still completely standard. Commit to one ratio for the whole set.

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