The 4:5 aspect ratio is a portrait frame that is 4 units wide for every 5 units tall, a width-to-height ratio of 0.8. Its most common pixel size is 1080 × 1350, Instagram's recommended portrait size and its tallest feed format for video. This sheet is part of the Playcut spec library and covers every 4:5 pixel size, the platforms that ask for it, the Instagram grid crop, print equivalents, CSS and which AI models output it natively.
What the 4:5 aspect ratio means
4:5 describes shape, not size. Divide the width by the height and you get 0.8; divide the height by the width and you get 1.25, so any 4:5 frame is 25% taller than it is wide. A 320 × 400 thumbnail and a 4800 × 6000 print file are both 4:5.
4:5 vs 5:4: same numbers, opposite orientation
4:5 is portrait and 5:4 is landscape. The pair share every digit, which is why they are confused so often. 1080 × 1350 is 4:5; rotate it and 1350 × 1080 is 5:4, the same family as the old 1280 × 1024 computer monitor. When a spec says "4:5", the height is always the larger number.
Other names you will see
The same ratio is written as 4x5, 4 by 5, 8:10, 1:1.25 or simply "Instagram portrait". Photographers call it 8×10 after the print size, and large-format shooters call it 4×5 after the sheet film. All of them reduce to 0.8.
4:5 aspect ratio in pixels: every common size
4:5 in pixels is any width multiplied by 1.25 for the height: 1080 × 1350 for social feeds, 1440 × 1800 for Meta ad placements, 2160 × 2700 for a 2K master and 4096 × 5120 for a 4K-wide master. The width must be divisible by 4 for the height to be a whole number, which is why 1000 × 1250 works but 1010 × 1262.5 does not.
| Width × height | Megapixels | Where it is used |
|---|---|---|
| 320 × 400 | 0.13 | Thumbnails, email previews |
| 480 × 600 | 0.29 | Low-bandwidth ad previews |
| 640 × 800 | 0.51 | Mobile placeholder images |
| 720 × 900 | 0.65 | Small feed renders |
| 864 × 1080 | 0.93 | 4:5 crop from a 1080p frame |
| 960 × 1200 | 1.15 | Web product cards |
| 1080 × 1350 | 1.46 | Instagram feed, LinkedIn video max |
| 1200 × 1500 | 1.80 | 4 × 5 in print at 300 ppi |
| 1440 × 1800 | 2.59 | Meta Ads Guide recommended size |
| 1600 × 2000 | 3.20 | 8 × 10 in print at 200 ppi |
| 1920 × 2400 | 4.61 | Full-HD-width portrait master |
| 2160 × 2700 | 5.83 | 2K portrait master |
| 2400 × 3000 | 7.20 | 8 × 10 in print at 300 ppi |
| 2880 × 3600 | 10.37 | Retina web hero, 2× of 1440 × 1800 |
| 3456 × 4320 | 14.93 | 4K-tall portrait master |
| 4096 × 5120 | 20.97 | 4K-wide portrait master |
| 4800 × 6000 | 28.80 | 16 × 20 in print at 300 ppi |
Why 1080 × 1350 became the default
1080 pixels is the width of a Full HD frame, so the first portrait social formats borrowed it and stretched the height. 1080 × 1.25 is exactly 1350, an integer, and the file weighs about 1.46 megapixels, light enough for a phone upload. Every platform that later adopted 4:5 quoted the same number.
1440 × 1800: the size Meta now asks for
Meta's Ads Guide for Instagram Feed image ads lists 1440 × 1800 as the recommended 4:5 resolution, with a 500-pixel minimum width and a 1% ratio tolerance. The Facebook Feed video ad spec recommends the same 1440 × 1800. It is 1080 × 1350 scaled by one third, which keeps the ratio exact. Upload the larger file and let the platform downscale.
How to compute any 4:5 size
Multiply the width by 1.25 to get the height, or multiply the height by 0.8 to get the width. If you already have a file and want to know what ratio it is, the free image aspect ratio calculator reduces any pair of dimensions to its simplest ratio and shows the nearest platform match. It doubles as an aspect ratio finder for files whose dimensions you only half remember.
Where the 4:5 aspect ratio is used
4:5 is a feed format. Instagram organic posts, Meta's Instagram Feed image ads and Facebook Feed video ads, LinkedIn video ads and Pinterest video Pins all accept it. Full-screen vertical placements such as TikTok, Reels, Shorts and Stories use 9:16 instead, covered on the 9:16 resolution sheet.
| Placement | 4:5 status | Recommended pixels | Notes |
|---|---|---|---|
| Instagram feed post / carousel | Accepted (recommended portrait size) | 1080 × 1350 | Feed range 1.91:1 to 4:5; 3:4 photos also accepted since May 2025 |
| Instagram Feed image ad | Recommended | 1440 × 1800 | Min width 500 px, 1% tolerance, 30 MB |
| Instagram Feed video ad | Not the current spec | 1080 × 1920 (9:16) | Meta moved the recommendation to 9:16 |
| Facebook Feed video ad | Recommended | 1440 × 1800 | MP4 or MOV, H.264, up to 4 GB |
| LinkedIn video ad | Accepted (vertical option) | 360 × 450 min, 1080 × 1350 max | MP4, 3 s to 30 min, 5% tolerance |
| Pinterest video Pin | Accepted | No pixel size published (1080 × 1350 is a common size) | 2:3 at 1000 × 1500 remains the standard Pin ratio |
| TikTok, Reels, Shorts, Stories | Not used | 1080 × 1920 (9:16) | 4:5 gets pillarboxed or cropped |
Instagram accepts feed images and videos from 1.91:1 landscape through 1:1 square up to 4:5 portrait, and 4:5 was the tallest frame an organic post could claim until Instagram added native 3:4 photo support in May 2025. 4:5 is still the tallest feed format for video and the size most brand templates are built around.
Meta Ads
Meta's Ads Guide currently recommends 4:5 at 1440 × 1800 for Instagram Feed image ads and for Facebook Feed video ads. Instagram Feed video ads are the exception: the guide now recommends 9:16 at 1080 × 1920. If you run one video across both placements, render the 9:16 master and crop a 4:5 version for Facebook.
Every platform's current video placements, with 4:5 marked where it is accepted, sit in one table on the social video spec sheet.
LinkedIn and Pinterest
LinkedIn's video ad specifications list 4:5 vertical from 360 × 450 up to 1080 × 1350 pixels alongside 1:1, 16:9 and 9:16. Pinterest's product specs accept 4:5 for standard-width video ads, although 2:3 at 1000 × 1500 is still the default Pin shape. The 3:2 and 2:3 aspect ratio sheet covers that taller Pinterest format.
4:5 and Instagram's 3:4 profile grid
Since Instagram moved its profile grid from square to 3:4 thumbnails in early 2025, a 4:5 post still displays uncropped in the feed but loses a thin strip on each side in the grid preview. At 1080 × 1350, the 3:4 crop is 1012.5 pixels wide, so 67.5 pixels of width disappear, 33.75 on each edge, or 6.25% of the frame.
The 1012 × 1350 safe zone
Keep faces, logos and text inside a centered 1012 × 1350 area and the grid crop will never touch them. The free safe zone checker overlays that boundary on any upload so you can see the crop before you post.
4:5 or 3:4: which to upload
Upload 4:5 when the feed is the priority and the grid is secondary, which is true for most brand accounts. Upload 3:4 when the profile grid is the storefront, as it is for photographers and creators who send traffic to the profile page. Either way, design to the 1012 × 1350 safe zone and both views work.
The 3:4 aspect ratio sheet lists the 3:4 pixel sizes, including 1080 × 1440 and 1536 × 2048, and the other places the grid shape appears.
4:5 in print and photography
4:5 predates social media. The 8 × 10 inch and 16 × 20 inch print sizes, 4 × 5 inch large-format sheet film and the 6 × 7 cm medium-format frame (a true 56 × 70 mm exposure) all sit at roughly 1.25:1, one of the oldest standard print ratios in the United States. Portrait photographers were already framing for it long before Instagram.
Pixels needed at 300 ppi
A 4 × 5 inch print needs 1200 × 1500 pixels, an 8 × 10 needs 2400 × 3000 and a 16 × 20 needs 4800 × 6000 at 300 pixels per inch. A 1080 × 1350 social file printed at 8 × 10 is only 135 ppi and will look soft, so render print masters at 2400 × 3000 or larger.
Cropping a 3:2 or 2:3 camera frame to 4:5
A 2:3 portrait frame is 0.667 wide for its height, so cropping it to 4:5 removes 16.7% of the height. From a 4000 × 6000 file, keep 4000 × 5000 and discard 500 pixels top and bottom. The image resizer does this crop-and-scale in one step without changing the ratio.
Which AI models generate 4:5 natively
Native 4:5 output is rarer than you would expect. On Playcut, the Nano Banana Pro and Nano Banana 2 image models and the HappyHorse 1.1 video model accept a 4:5 setting. Veo 3.1 (16:9 and 9:16 only), Grok Imagine, Seedance 2.0 and Wan 2.7 do not, so 4:5 output from those models is a 3:4 or 9:16 generation cropped afterwards.
Image models: Nano Banana Pro and Nano Banana 2
Both Google image models accept a 4:5 setting. Playcut's dimension table puts the output at 928 × 1152 at 1K, 1856 × 2304 at 2K and 3712 × 4608 at 4K; that table is Playcut's own, since Google documents only the square sizes.
928 ÷ 1152 is 0.8056, roughly 4.03:5 rather than exactly 0.8. If a platform enforces a 1% tolerance you are inside it; if you need an exact 4:5, crop to the nearest exact size: 920 × 1150 at 1K, 1840 × 2300 at 2K or 3680 × 4600 at 4K.
Video: HappyHorse 1.1
HappyHorse 1.1 is the one video model on Playcut with a 4:5 option, offered on text-to-video and reference-to-video at 720p and 1080p for 3 to 15 seconds. Pick 4:5 in Playcut's video generator and the clip renders portrait with no letterbox, ready for a Facebook Feed or LinkedIn placement.
Models without 4:5
Veo 3.1 and Omni Flash output 16:9 and 9:16 only. Seedance 2.0 and Wan 2.7 stop at 3:4, and Grok Imagine's image and video models offer 3:4 and 2:3 but skip 4:5. For those, generate at 3:4, then crop 6.25% of the height to reach 4:5. Framing the subject centrally at generation time makes the crop invisible.
Midjourney reaches the same shape with --ar 4:5; the
Midjourney aspect ratio guide covers the parameter, its version
limits and the pixel size each value returns.
CSS aspect ratio for a 4:5 box
In CSS, aspect-ratio: 4 / 5; on an element with an automatic height locks it to 4:5 at any
width. The property has been Baseline widely available across Chrome, Edge, Firefox and Safari since
September 2021, according to
MDN's aspect-ratio reference.
Why one dimension must stay auto
The property only applies when at least one of width or height is auto. Set both explicitly
and the declared sizes win, and the ratio is ignored. The normative behaviour is defined in the
CSS Box Sizing Level 4 aspect-ratio section.
The padding-top fallback
For browsers that predate the property, wrap the content in a zero-height container with
padding-top: 125%, which is 5 ÷ 4 expressed as a percentage of the width, and position the
child absolutely inside it. Add object-fit: cover on the image or video so it fills the 4:5 box
without distortion.
4:5 compared with 1:1, 16:9, 9:16, 3:4, 2:3 and 5:4
At the same 1080-pixel width, a 4:5 frame is 1350 pixels tall: 25% taller than a 1:1 square, 2.22 times the area of 16:9, 6.25% shorter than 3:4 and 30% shorter than 9:16. The boxes below are drawn at equal width so the height difference is visible.
| Ratio | Decimal | Height at 1080 wide | Area vs 4:5 |
|---|---|---|---|
| 16:9 | 1.778 | 607.5 | −55% |
| 5:4 | 1.250 | 864 | −36% |
| 1:1 | 1.000 | 1080 | −20% |
| 4:5 | 0.800 | 1350 | baseline |
| 3:4 | 0.750 | 1440 | +6.7% |
| 2:3 | 0.667 | 1620 | +20% |
| 9:16 | 0.563 | 1920 | +42% |
The square in that table has its own reference: the 1:1 square format sheet lists every square pixel size and the crop math from 4:5 and 3:4.
4:5 vs 2:3 aspect ratio
The 2:3 aspect ratio is the portrait orientation of a 35 mm camera frame and the standard Pinterest Pin. At 1080 wide it is 1620 tall, 20% more area than 4:5. Choose 2:3 for Pinterest and print-from-camera workflows; choose 4:5 for Instagram, Facebook and LinkedIn feeds, where anything taller gets cropped.
When to choose 4:5 over 3:4 or 9:16
Choose 4:5 for any in-feed placement on Instagram, Facebook or LinkedIn, because it is the tallest video frame those feeds show without cropping, and only Instagram's 3:4 photos go taller. Choose 9:16 for full-screen vertical surfaces and 3:4 when the Instagram profile grid is your storefront. Whichever you pick, confirm the export dimensions in the aspect ratio calculator before you upload.