Learn what image aspect ratios mean and when to use each. Covers 1:1 square, 16:9 widescreen, 4:3, 9:16 portrait, and platform-specific crop guides for social media.
An aspect ratio is the proportional relationship between an image's width and height, written as width:height. It describes shape without specifying actual pixel size.
A 1920×1080px image and a 1280×720px image have the same 16:9 aspect ratio — same shape, different sizes. Understanding ratios lets you crop correctly for any platform without distorting content.
| Ratio | Shape | Best For |
|---|---|---|
| 1:1 | Square | Instagram feed, profile photos, album art |
| 4:3 | Slightly wide | Traditional photography, tablets, standard print |
| 3:2 | Slightly wide | 35mm film, standard 4×6 print, DSLR default |
| 16:9 | Wide (widescreen) | YouTube, presentations, TV, desktop wallpapers |
| 9:16 | Tall (vertical) | TikTok, Instagram/Facebook Stories, Reels |
| 4:5 | Slightly tall | Instagram portrait — maximum feed real estate |
Instagram 1:1: Select 1:1 lock in Image Cropper, center your subject. Safe for all feed posts.
YouTube 16:9: Crop the horizontal region containing your key visual element.
Instagram Stories 9:16: Crop the vertical center third of landscape photos.
Standard print 3:2: Most smartphones shoot at approximately this ratio — minimal cropping needed for 4×6 prints.
| Platform | Ratio | Recommended Pixels |
|---|---|---|
| Instagram Feed | 1:1 or 4:5 | 1080×1080px or 1080×1350px |
| Instagram Story | 9:16 | 1080×1920px |
| YouTube Thumbnail | 16:9 | 1280×720px |
| Facebook Post | 1.91:1 | 1200×630px |
| Twitter Post | 16:9 | 1200×675px |
| Pinterest Pin | 2:3 | 1000×1500px |
| Standard Print | 3:2 | 4×6 inches |
Use our free Aspect Ratio Calculator — results appear as you type. No sign-up needed!
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