If your Instagram profile suddenly looks messy, you are not imagining it. Instagram’s grid now shows tall rectangular tiles instead of squares, so older square posts look short and many portrait posts lose a strip at the edges. The fix is simple: post at the new 3:4 size. This guide shows exactly which size to use, how to resize photos without cutting anything out, and the mistakes that still make photos look cropped.
Quick answer
- Best size for Instagram’s grid: 3:4, which is 1080 × 1440 pixels.
- No cropping: fit the photo into 1080 × 1440 and fill the empty space with blurred edges or a border.
- Fastest way: use the free Instagram 3:4 resizer — it does a whole batch at once in your browser.
What changed in Instagram’s grid
For most of its history Instagram was built around squares. In January 2025, Instagram head Adam Mosseri announced that profile grids would switch to taller rectangles, because most photos and videos are now shot vertically on phones. Support for posting 3:4 photos in the feed followed later in 2025.
That one change affects every post on your profile:
- 3:4 posts (1080 × 1440) fill the new grid tile exactly.
- 4:5 posts (1080 × 1350) — the old favorite — still look great in the feed, but a thin strip is trimmed from the left and right in the grid.
- Square posts (1080 × 1080) lose some of the top and bottom in the grid preview.
- Landscape posts are trimmed heavily in the grid, often cutting off the subject.
Which size should you use?
| If you want… | Use this size | Why |
|---|---|---|
| A clean, uncropped profile grid | 3:4 — 1080 × 1440 | Matches the grid tile exactly |
| The biggest possible post in the feed | 3:4 or 4:5 | Both take up most of the screen as people scroll |
| Stories, Reels covers or full-screen slides | 9:16 — 1080 × 1920 | Fills the whole phone screen |
| A landscape photo with nothing cut off | 3:4 with blurred edges or a border | Keeps the full photo visible |
For most creators, the answer is now 3:4 at 1080 × 1440. Instagram displays feed photos at 1080 pixels wide, so uploading a bigger file does not make it sharper — it just gets scaled down.
How to resize photos to 3:4 without cropping (step by step)
- Open the free Instagram 3:4 resizer. It works on your phone or computer and nothing is uploaded — your photos stay on your device.
- Drop in one photo or a whole shoot.
- Choose how to handle photos that are not already 3:4: Fit + blurred edges keeps the entire photo and fills the gaps with a soft, blurred copy of it; Fit + solid color adds a clean border; Crop to fill fills the frame and trims the edges.
- Optional: add your @handle as a watermark and set a file name pattern like
trip-{n}. - Click Prepare, then download each photo or everything as one ZIP and post as usual.
As a bonus, the tool strips hidden metadata such as the GPS location where the photo was taken — useful if you share the same files anywhere else.
Blurred edges, border or crop: which looks best?
- Blurred edges are the most seamless option for travel, landscape and lifestyle photos. Your full image stays sharp in the middle.
- A white or colored border gives a deliberate, gallery-style look. It works best if you use it consistently so your grid looks planned.
- Cropping is best when your subject sits in the middle of the frame. For portraits, crop towards the top so heads are never cut off.
Mistakes that still make photos look cropped
- Mixing ratios in a carousel. All slides follow the shape of the first one, so a 3:4 first slide followed by landscape photos means those photos get cropped. Prepare every slide at 3:4 together.
- Text and logos at the very edge. Different views trim slightly differently. Keep important details away from the outer edges.
- Over-compressing before upload. Instagram compresses your photo again, so start from a good-quality file. A high-quality JPEG is the safest choice.
- Uploading screenshots in odd shapes. Very tall phone screenshots exceed Instagram’s limits and get cut. Fit them into 3:4 with a border instead.
What about my old square posts?
Your existing posts stay as they are. You do not need to redo your whole profile — just post new photos at 3:4 and your grid will look consistent from that point on. If an old post with an important cover looks badly trimmed, consider reposting it at 3:4.
Frequently asked questions
What is the best Instagram post size in 2026?
1080 × 1440 pixels (3:4) for posts that fill the profile grid. 1080 × 1350 (4:5) is still a good choice for the feed.
Can I post a landscape photo on Instagram without cropping?
Yes. Place the photo inside a 3:4 or 4:5 frame and fill the empty space with blurred edges or a border. The no-crop resizer does this in one click.
Is 3:4 also right for Stories and Reels?
No — Stories and Reels are full-screen 9:16 (1080 × 1920). Use the photo to 9:16 converter for those.
Getting a whole shoot ready for several platforms at once? Post Prep resizes, watermarks, compresses and renames a batch for Instagram, TikTok, YouTube and more in a single pass.