X (Twitter) Sizes & Dimensions Guide
X (Twitter) image and video sizes for posts, video, the header banner, and your profile photo. PostFast applies them when you schedule.
All X (Twitter) Sizes at a GlanceUpdated 2026
Every X (Twitter) content type with its recommended dimensions, aspect ratio, and limits. Tap any content type for the full specification.
| Content Type | Dimensions (px) | Aspect Ratio | Max File Size | Max Length |
|---|---|---|---|---|
| Post | 1200×675 | 16:9 | 5MB | n/a |
| Video | 1280×720 | 16:9 | 512MB | 140 seconds |
| Header | 1500×500 | 3:1 | 2MB | n/a |
| Profile Picture | 400×400 | 1:1 | 2MB | n/a |
Why X (Twitter) sizes matter
X shows media at a limited width in the timeline and crops anything that does not fit a supported ratio, so the preview a follower sees may not match what you uploaded. Video length and file-size limits also differ between standard and Premium accounts. Sizing posts correctly means your image shows in full without an awkward crop.
X (Twitter) content specificationsUpdated 2026
Post
Updated 2026Post images display best at 1200x675px (16:9), which fills the in-timeline preview without cropping. You can attach up to 4 images per post.
Video
Updated 2026Standard accounts can upload video up to 140 seconds at 1280x720px (16:9). Premium raises the length and file-size limits substantially. Keep clips short for timeline engagement.
Header
Updated 2026The profile header (banner) is 1500x500px (3:1). Your round profile photo and name overlap the lower-left corner, so keep that area clear.
Profile Picture
Updated 2026Profile photos are uploaded at 400x400px and shown in a circle.
X (Twitter) best practices and common mistakes
Best practices
- ✓Use 1200x675px (16:9) for post images so they show without cropping.
- ✓Keep the lower-left of your 1500x500px header clear, where the avatar sits.
- ✓Compress post images under 5MB to avoid extra re-compression.
- ✓Upload video as MP4 (H.264) and keep standard-account clips under 140 seconds.
- ✓Use PNG for graphics with text and JPG for photos.
Common mistakes to avoid
- ✗Uploading tall or square images that get cropped to a landscape preview.
- ✗Putting key header content in the lower-left behind the avatar and name.
- ✗Exceeding the 140-second video limit on a standard account.
Developer Resources
X (Twitter) API Guides
Learn how to schedule X (Twitter) content programmatically via API
Frequently asked questions about X (Twitter) sizes
What are the X (Twitter) image and video sizes in 2026?
X (Twitter) sizes by content type: Post 1200×675px, Video 1280×720px, Header 1500×500px, Profile Picture 400×400px. See the table above for the aspect ratio, file size, and supported formats of each one.
What is the best image size for X (Twitter)?
The recommended image size for X (Twitter) is 1200×675px (16:9), used for posts. Upload at this size to avoid cropping and limit compression.
What aspect ratios does X (Twitter) use?
X (Twitter) uses 16:9 for posts and videos, 3:1 for headers, and 1:1 for profile pictures.
How long can X (Twitter) videos be?
On X (Twitter), Video up to 140 seconds.
What file formats does X (Twitter) support?
Across its content types, X (Twitter) supports JPG, JPEG, PNG, WEBP, GIF, MP4, and MOV. Use JPG for photos, PNG for graphics with text, and MP4 for video.
Does X compress uploaded images?
X may compress images larger than about 5MB and re-encodes most uploads. Posting a PNG or a well-optimized JPG at 1200x675px and under 5MB gives the cleanest result in the timeline.
What size is the X (Twitter) header image?
The X header (banner) is 1500x500px (3:1). Your round profile photo and display name sit over the lower-left corner, so keep that area clear of important content.
Sizes for other platforms
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