Open Instagram right now and a good chunk of your feed is AI. Tiny action-figure versions of your friends, sealed in plastic like a toy. Photos scribbled over to look like a kid drew them in MS Paint. Grainy 90s camcorder shots of things that clearly happened last week. The tools got good and cheap, so everyone is playing.

The trends themselves change every few weeks. The annoying part does not: you make the image, go to post it, and it comes out soft, cropped in a weird spot, or too big to upload. This is a quick tour of what is trending this month, and the exact size to export each one so it actually looks sharp.

A phone feed filled with different viral AI photo trends
This month's feed: action figures, bad-on-purpose doodles, fake-vintage everything.

What people are posting this month

A snapshot of the trends doing real numbers right now:

  • Action-figure portraits. You, but as a boxed collectible with little plastic accessories. Refuses to die.
  • MS Paint doodles. The newest one. You hand a nice photo to a chatbot and ask it to redraw it badly, like a kid with a mouse in 1998. It is silly and people cannot stop.
  • 90s camcorder and CRT. Timestamp in the corner, scan lines, blown-out flash. New photos dressed up as old ones.
  • Pet to human. What your dog would look like as a person. As cursed as it sounds.
  • Roast-me portraits. Ask the AI to insult you, affectionately, in picture form.

By the time you read this there will be a new one. That is the whole point: the trend does not matter, the workflow does. You are making images outside the app you want to post them in, and that is where the sizing trouble starts.

Why your AI photo looks bad after you post it

Two reasons, almost always.

Wrong shape. Most AI tools hand you a square or some odd ratio. Instagram wants tall. Drop a square into a space built for 4:5 and the app either crops someone's head off or shrinks the whole thing. Reels and TikTok want 9:16, so a square just floats in the middle with bars on top and bottom.

The file is enormous. A 4K image out of something like Nano Banana 2 can be 8 to 15 MB. Upload that on a weak signal and the platform crushes it with its own compression, which is exactly the soft, smeary look you were trying to avoid. Resize and compress it yourself first and you control the quality instead of handing that decision to the upload.

The sizes that actually matter in 2026

You do not need fifty numbers. These cover almost everything:

Comparison of 1 to 1, 4 to 5, and 9 to 16 image ratios
Same photo, three ratios. Tall wins on a phone.
PlatformWhereSize (px)Ratio
InstagramFeed (best)1080 x 13504:5
InstagramSquare1080 x 10801:1
Instagram / FacebookStories, Reels1080 x 19209:16
TikTokEverything1080 x 19209:16
X (Twitter)In the feed1600 x 90016:9
PinterestPin1000 x 15002:3
FacebookFeed1200 x 6301.91:1
AnyProfile picture400 x 400 or larger1:1
Remember one number Make it 4:5, which is 1080 x 1350. Tall posts take up the most screen on a phone, and in 2026 vertical posts pull up to 40% more engagement than squares. Build for tall, then crop down for everywhere else.

How to get the size right without wrecking the photo

The classic mistake is stretching an image to fit. Never do that, it squishes faces. Crop to the ratio first, then resize to the pixels.

Cropping an AI image to 4 by 5 and then resizing it to 1080 pixels wide
Crop to the ratio, then set the width. The height follows.
  1. Crop to the shape. Open the crop tool, pick the ratio (4:5, 1:1, or 9:16), and frame your subject.
  2. Resize to the pixels. Drop it in the image resizer and set the width to 1080. The height falls into place.
  3. Export. JPG for photos. PNG only if you genuinely need a transparent background.

If your AI image arrived as a heavy PNG and you want a lean JPG, the image converter swaps it in one step.

Shrink the file before it goes up

This is the step almost everyone skips, then wonders why a crisp render turned muddy. Run the final image through an image compressor and aim for under about 1 MB for a feed post. You will not see the difference. The upload will, and it will stop re-compressing your photo into porridge.

Turning a trend image into a profile picture

Half the reason people make these is a fresh avatar. Profile pictures are square and they show up tiny, so framing matters more than you think. Crop to 1:1 with the profile picture cropper, keep your face away from the edges since apps mask it into a circle, and export at least 400 x 400.

The part nobody mentions: what is baked into the file

Two things ride along with AI images. There are visible badges or logos in a corner, which a quick crop removes. And there are invisible content credentials, like Google's SynthID or the C2PA standard, which quietly mark an image as AI made. Those live in the data, not the pixels, so resizing or compressing does not strip them, and honestly you should not try to. If you want to see what is actually attached to a file, the metadata viewer spells it out.

While you are at it This is a good habit for normal photos too. Pictures straight off your phone often carry the GPS location where they were taken. Worth a check before anything goes public.

The 30-second recipe

  1. Make your trend image.
  2. Crop to 4:5 for the feed, or 9:16 for Reels and TikTok.
  3. Resize to 1080 wide.
  4. Compress to under 1 MB.
  5. Post it before the trend dies.