PROMPT GUIDE

SDXL Resolutions (Recommended Sizes) and How to Pick a Ratio

Stable Diffusion XL (SDXL) based models, such as Illustrious, NoobAI and Pony, were trained at roughly the pixel count of 1024x1024. Sizes far from that tend to produce extra people or stretched bodies. This guide lists the commonly used recommended sizes by aspect ratio.

Last updated: 2026-10-22 approx. 3 min read

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The short answer

The base SDXL resolution is 1024x1024 (about one megapixel). For portrait use 832x1216, for landscape 1216x832, and for something close to 16:9 use 1344x768. Sizes far from these cause extra people or stretched bodies, so generate at a recommended size and enlarge later with Hires.fix.

What is the recommended SDXL resolution?

The base is 1024x1024 (about one megapixel); 832x1216 for portrait and 1216x832 for landscape are the most common.

The base SDXL size is 1024x1024, about one million pixels. For portrait or landscape pictures, keep width times height close to one megapixel and use numbers divisible by 64. The table shows size combinations widely known to have been used in SDXL training.

Width x height	Approx. ratio	Good for
1024x1024	1:1 (square)	Icons, face close-ups, square Instagram posts
896x1152	7:9 (slightly tall)	Bust shots and upper body
832x1216	2:3 (portrait)	Character art, full body, base for phone wallpapers
768x1344	Close to 9:16	Full phone screen, Stories
640x1536	Very tall	Tall full-body art, hanging-scroll style compositions
1152x896	9:7 (slightly wide)	Two people side by side, desk scenes
1216x832	3:2 (landscape)	Scenery, scenes with a background
1344x768	Close to 16:9	Desktop wallpapers, video thumbnails
1536x640	Very wide	Cinematic wide shots, banners

Rinka's tips

If unsure, start with 832x1216 for characters and 1216x832 for scenery
SD1.5 sizes such as 512x512 are too small for SDXL, and pictures tend to break down
Starting at a very large size (such as 2048x2048) leads to extra people or stretched bodies. To go bigger, use Hires.fix or an upscaler afterwards

How does the aspect ratio change the picture?

Portrait fits the full body, landscape fits the background, and square fits the face.

Even with the same character, changing only the ratio changes how much fits in the frame and which composition works best. Portrait suits a full figure, landscape suits a background, and square keeps the area around the face together.

Portrait 832x1216 SDXL resolution example: full body anime girl — 縦長（2:3）・全身の立ち絵

Landscape 1216x832 SDXL resolution example: girl in a seaside scene — 縦長（2:3）・全身の立ち絵

Illustration usage rules

Which size is best for social media and wallpapers?

As a guide: 896x1152 for Instagram, 768x1344 for Stories, and 1024x1024 for icons.

Use	Recommended	Notes
A single post on X (Twitter)	1216x832 or 832x1216	It may be cropped in the timeline. Check with a preview before posting
Instagram feed	896x1152 (close to 4:5)	A tall ratio close to 4:5 uses more of the screen
Instagram or TikTok Stories	768x1344	Close to 9:16. Watch where text appears at the top and bottom
Illustrations on pixiv	832x1216	Portrait images look larger in the list
Social media icons	1024x1024	Cropped into a circle, so center the face
Desktop wallpaper	1344x768, then enlarge	Upscale 2x after generating

How do you choose a size and generate? (Steps)

Pick a ratio for your purpose, keep multiples of 64, generate, then enlarge later with Hires.fix or similar.

Decide what the picture is for (where you will post it, a wallpaper, an icon) and choose the closest ratio from the table
Enter a width and height divisible by 64 (for example 832x1216)
Use portrait for a full body and landscape for a wide background, and match the framing tags (full body, wide shot and so on)
When you get a picture you like, enlarge it 1.5 to 2 times with Hires.fix or an upscaler
Check how the destination site will crop it with a preview tool before posting

What if it does not work? (Common mistakes and fixes)

Here are common problems with their causes and fixes. Change only one thing at a time and compare with the same seed, which makes the cause easier to find.

Problem	Common cause	Fix
Two or three people appear	Too wide or too large	Go back to about 1216x832, or add solo
The body or neck stretches	Too tall	Go back to about 832x1216 and add a full-body tag
Faces are crushed or details are rough	A full-body picture where the person is small	Enlarge with Hires.fix, or use an upper-body composition
Blurry, low-quality pictures	Generated at an SD1.5 size (such as 512x768)	Switch to a recommended SDXL size
Errors or size mismatches	Numbers not divisible by 64	Change to multiples of 64

Copy and paste: composition templates for each ratio

Examples for a full body in portrait (832x1216) and a scene in landscape (1216x832). Replace the parts in brackets.

1girl, solo, [hairstyle], [outfit], standing, full body, looking at viewer, smile, [place], masterpiece, best quality

1girl, solo, [outfit], sitting, from side, wide shot, scenery, [place], sunset, depth of field, masterpiece, best quality

For full-body, upper-body and wide framing tags: Composition Prompt Tag List (Framing, Camera Angles, Foreground Blur) →

For Hires.fix settings to enlarge afterwards: Hires.fix Settings (Upscale Ratio, Denoising Strength, Upscaler) →

For a cinematic wide look: Letterboxed (Black Bars) and Cinematic Composition Prompts →

FAQ

Frequently Asked Questions

What is the recommended SDXL resolution?

The base is 1024x1024 (about one megapixel). Sizes with roughly the same pixel count in multiples of 64, such as 832x1216 for portrait and 1216x832 for landscape, are commonly used.

Which size should I use for portrait SDXL images?

For character art or full body, 832x1216 is the easiest. To get closer to a full phone screen, 768x1344 is also used.

What is the SDXL size for 16:9?

It is not exactly 16:9, but 1344x768 is commonly used as a close ratio. If needed, crop it slightly to 16:9 afterwards.

What happens if I generate at a large size?

Sizes far from the training size tend to produce extra people or stretched bodies. To go bigger, generate at a recommended size and then enlarge with Hires.fix or an upscaler.