An aspect ratio is the shape of an image written as width to height. The ones you will use most are 1:1 (square: profile pictures, product photos, Instagram grid), 4:5 (tall feed posts), 16:9 (website banners, YouTube, presentations), 9:16 (Stories, Reels, TikTok, WhatsApp Status) and 3:2 or 4:3 (camera photos and prints). Crop to the ratio of the place the image will appear, so the platform does not crop it for you and cut off faces or text.
- Aspect ratio is the shape; resolution is the size in pixels. Same ratio, many sizes.
- Pick the ratio for where the image will be shown, then crop once.
- Leave safe space at the edges for vertical formats, where buttons and captions cover the image.
- Crop from the original photo so you keep as many pixels as possible.
- Choose 1:1, 4:3, 16:9 or free crop in the free Image Cropper.
The group photo that lost two people
A family takes a wide group photo at a wedding: twelve people in a row. Someone posts it as a profile picture. The platform crops it to a square, and then to a circle. Now the photo shows four people in the middle and half of an aunt’s face on each side.
The photo was fine. The shape was wrong for where it went. Knowing the common ratios lets you choose the crop yourself instead of letting an app choose it badly.
Common aspect ratios and where they are used
| Ratio | Shape | Typical uses | Example size |
|---|---|---|---|
| 1:1 | Square | Profile pictures, product photos, Instagram grid, WhatsApp DP | 1080 x 1080 |
| 4:5 | Slightly tall | Instagram and Facebook feed posts (more screen space) | 1080 x 1350 |
| 9:16 | Tall vertical | Stories, Reels, TikTok, Shorts, WhatsApp Status | 1080 x 1920 |
| 16:9 | Wide | YouTube thumbnails, website banners, slides, TV | 1920 x 1080 |
| 4:3 | Classic | Many phone cameras, tablets, older screens | 1600 x 1200 |
| 3:2 | Camera | DSLR and mirrorless photos, 4 x 6 prints | 1800 x 1200 |
| 1.91:1 | Very wide | Link previews and Open Graph images | 1200 x 630 |
For a detailed list by platform, see our social media image sizes cheat sheet.
How to choose the right ratio
- Start with the destinationWhere will the image be shown first? Feed, Story, website banner, print?
- Check the subjectA single person suits 4:5 or 1:1. A landscape or group suits 16:9 or 3:2.
- Plan safe zonesIn 9:16 formats, keep faces and text away from the top and bottom, where usernames and buttons sit.
- Crop once from the originalUse the ratio preset in the Image Cropper.
- Make versions if neededOne photo can become a square post, a 9:16 Story and a 16:9 banner. Crop each from the original.
Ratio vs resolution
A 1080 x 1080 image and a 3000 x 3000 image are both 1:1. The ratio is the same; the resolution (number of pixels) is different. Platforms often resize your upload to their own resolution, so matching the ratio matters most. Then resize and compress to a sensible size with the Image Compressor.
Common mistakes
- Stretching an image to fit a ratio instead of cropping, which distorts faces and products.
- Putting text near the edges of a 9:16 Story.
- Uploading a 16:9 photo as a profile picture and letting it auto-crop.
- Cropping a small screenshot and then enlarging it, which makes it blurry. See how to crop without losing quality.
Sources
Frequently asked questions
What is an aspect ratio?
The shape of an image written as width to height, such as 1:1 for square or 16:9 for wide.
What aspect ratio is best for Instagram posts?
4:5 portrait (1080 x 1350) uses the most feed space. 1:1 square also works well.
What aspect ratio do Stories and Reels use?
9:16 vertical, usually 1080 x 1920 pixels.
What is the difference between aspect ratio and resolution?
Aspect ratio is the shape. Resolution is the number of pixels. Two images can share a ratio but have different resolutions.
Should I stretch or crop an image to change its ratio?
Crop. Stretching distorts faces, text and products.
Crop to 16:9, 4:3, square or freeform, zoom and compress in one step, right in your browser.
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