# Sizes and aspect ratios Pick Auto or one of nine aspect ratios, see the pixel size each one makes, and learn which platform it fits. Source: https://infinall.ai/docs/image/sizes-and-aspect-ratios Last checked: 2026-10-26 ## What it is The aspect ratio is the shape of the picture: square, tall or wide. You choose it before you make an image, and every image from that send comes out in that shape. ## Who can use it Everyone. Free and Pro accounts have the same nine shapes and the same sizes. ## Cost Free, no credits. The shape does not change the price. Only the quality and the engine do, and making the image uses credits as described in [create an image](/docs/image/create-an-image). ## Where to find it Open **Image settings**. It is the small sliders button in the composer, on Home (Image tab) and in the Studio chat panel. The **Aspect ratio** tiles are in the middle of the panel. ## Buttons and controls ![The Image settings panel open with Quality, the Aspect ratio tiles and Generations.](/docs/screens/image/sizes-and-aspect-ratios.webp) | # | Name in the app | What it does | Plan | | --- | --- | --- | --- | | 1 | Image settings | Opens the settings panel. The button also reads out your choices, for example Auto, 1 variant, High. | Both | | 2 | Quality | Low, Medium or High. See [quality levels](/docs/image/quality-levels). | Both | | 3 | Aspect ratio | The row of shape tiles. Click one to choose it. | Both | | 4 | Auto | Lets Infinall AI pick the shape from the words in your prompt. | Both | | 5 | 1:1 | Square tile. | Both | | 6 | 9:16 | Tall story tile. | Both | | 7 | 16:9 | Wide tile. | Both | | 8 | Generations | How many images one send makes. See [number of images](/docs/image/number-of-images). | Both | The other tiles are 4:5, 2:3, 3:2, 4:3, 3:4 and 1.91:1. They sit in the same row. ## How to choose a shape 1. Open **Image settings**. 2. Under **Aspect ratio**, click the shape you want. 3. Close the panel and send your prompt. ## How to let Auto choose 1. Leave **Aspect ratio** on **Auto**. 2. Say where the picture is going in your prompt, for example "Instagram story" or "YouTube thumbnail". 3. Infinall AI reads those words and picks a shape. If it finds none, it makes a square. ## Options explained Each shape makes a fixed pixel size. Images are cropped to the shape you choose, never stretched. No shape goes above 1,536 pixels on its long side. | Aspect ratio | Pixel size (width x height) | Good for | | --- | --- | --- | | Auto | Picked from your prompt | When you name the platform or format in the prompt. Falls back to 1:1. | | 1:1 | 1,024 x 1,024 | Square posts, profile pictures, logos, album covers. | | 4:5 | 1,024 x 1,280 | Feed posts on Instagram and Meta. | | 9:16 | 864 x 1,536 | Stories, reels, shorts, TikTok, phone wallpapers. | | 2:3 | 1,024 x 1,536 | Posters, book and magazine covers. | | 16:9 | 1,536 x 864 | YouTube thumbnails, hero images, banners, desktop wallpapers. | | 3:2 | 1,536 x 1,024 | Photo prints and landscape photos. | | 4:3 | 1,365 x 1,024 | Classic landscape. | | 3:4 | 1,024 x 1,365 | Classic portrait. | | 1.91:1 | 1,200 x 628 | LinkedIn and Facebook ads, link previews. | Words that make **Auto** choose a shape, by shape: - 9:16: story, reel, TikTok, shorts, vertical video, phone screen, mobile wallpaper. - 16:9: YouTube thumbnail, hero image, banner, widescreen, desktop wallpaper. - 1.91:1: LinkedIn ad, Facebook ad, link preview, og image. - 4:5: Instagram feed, Facebook feed, feed post. - 2:3: poster, book cover, magazine cover, album art. - 3:2: photo print, landscape photo. - 1:1: Instagram post, square, profile picture, logo. If a prompt has words for more than one shape, the first match in that order wins, starting with 9:16. ## Limits - There is no custom size. You cannot type your own width and height for a new image. - There is no 2K or 4K option for a new image. To make an existing image bigger, see [upscale](/docs/image/upscale). - The ratio you pick does not change the price. ## When something goes wrong | Message in the app | What it means | What to do | | --- | --- | --- | | Request must include `size` or `aspect`. | The app sent no shape at all. This is rare. | Pick an aspect ratio in **Image settings** and send again. | | Couldn't generate images. | The request failed. | Choose **Retry**. | ## Questions ### Can I type my own size? No. New images use one of the nine shapes. You can resize or extend an image after it is made, see [upscale](/docs/image/upscale) and [edit a selected area](/docs/image/edit-a-selected-area). ### Why is my 16:9 image shorter than I expected? Images are cropped to the shape you chose and never stretched larger. A 16:9 image is wide and not very tall, so its pixel size comes from the table above. ### Which shape is best for an Instagram story? Choose 9:16. For an Instagram feed post, choose 4:5. ### Does Auto always get it right? It only reads your words. If you do not name a platform or format, you get a square. Choose a shape yourself when you are sure. ### Does a different shape cost more? No. The price follows the quality and the engine, not the shape.