Instagram Post Size 2026: Every Ratio in Pixels
Use 1080 × 1350 px (4:5) for Instagram feed posts. Instagram keeps any ratio from 1.91:1 to 3:4 and crops the rest.
Instagram shows photos up to 1080 pixels wide, so every size below starts at 1080 px. Pick the shape, then match the height:
- Portrait 4:5: 1080 × 1350 px, the best default for feed posts
- Tall 3:4: 1080 × 1440 px, the tallest ratio Instagram keeps uncropped
- Square 1:1: 1080 × 1080 px, the classic shape, easy to reuse elsewhere
- Landscape 1.91:1: 1080 × 566 px, the widest ratio Instagram keeps
- Stories and Reels 9:16: 1080 × 1920 px, full-screen vertical
More detail: Instagram story size, Instagram reel size, Instagram carousel size, or every social media size in one place.
Why 1080 × 1350 is the size to use
- It takes up more of the screen than a square. A 4:5 portrait post is 25% taller than a 1:1 post at the same width, so it fills more of the feed on a phone and your text has more room.
- 1080 px wide is what Instagram keeps. Instagram sizes bigger photos down to 1080 px and enlarges photos under 320 px. Export at exactly 1080 px wide and nothing gets resampled behind your back.
- It sits safely inside the supported range. 4:5 is between 1.91:1 and 3:4, so Instagram posts it as is. The same size works for every slide of a carousel (see the Instagram carousel size guide).
Common mistakes to avoid
- Posting a 9:16 image to the feed. A full-screen Story image is taller than 3:4, so Instagram crops it in the feed and the top or bottom of your design disappears. Make a separate 4:5 version for the feed.
- Putting text right at the edges. Profile grid previews are now taller rectangles (about 3:4), so the left and right edges of a 4:5 post can be cut off on your profile. Keep faces, titles and logos near the center, and check them with the free Social Safe Zones tool.
- Mixing sizes in one carousel. The first photo sets the shape for the whole post, so later photos get cropped to match. Export every slide at the same size.
The hard part isn't the size, it's making the slides
Setting a canvas to 1080 × 1350 takes ten seconds. Filling it with something people stop for, in your fonts and colors, post after post, is the part that eats your week.
EasySociable turns a prompt into a branded carousel that is already sized for Instagram. Ask your AI agent (Claude, ChatGPT, Cursor) or use Studio, built on 48 templates. You edit the words and download PNGs.
Free plan includes 3 downloads per month with zero watermark. No credit card required.
Proven formulas for your next Instagram post
Pick a formula, paste the prompt into your AI agent or open it in Studio, and get 1080 × 1350 slides.
Frequently Asked Questions
What is the best Instagram post size?
Use 1080 × 1350 px (4:5 portrait). It is the safe default for feed posts and carousels.
What ratios does Instagram allow for photos?
Instagram keeps photos with a ratio between 1.91:1 (landscape) and 3:4 (portrait). Anything outside that range gets cropped to fit.
Does Instagram reduce image quality?
Photos wider than 1080 px are sized down to 1080 px, and photos narrower than 320 px are enlarged. Upload at exactly 1080 px wide to stay in control.
What size is an Instagram Story or Reel?
Use 1080 × 1920 px (9:16) so it fills a phone screen from top to bottom.
Source: Instagram Help Center, Image resolution of photos you share on Instagram, checked October 2026.
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Written by Murphy, Founder of EasySociable