Quick answer: On X, upload your profile picture at 400 x 400 pixels (a square, which X shows as a circle) and your header image at 1500 x 500 pixels (a 3:1 rectangle). Use JPG or PNG. X lists a 2 MB limit for profile photos and 5 MB for headers in its profile customization help page. Keep faces and text near the center of the header. Leave the lower-left corner empty, because your avatar covers it.

The rest of this guide covers why those numbers matter, how the crop works on phones and desktop, and what to put in each image so a profile visit turns into a follow.

Table of contents

1. What are the exact X profile picture and header sizes?

2. How does X crop your header and avatar?

3. What makes a profile picture work at tiny sizes?

4. What should go in your header image?

5. What should creators, indie hackers, SaaS founders, and marketers use?

6. Which tool should you use to make them?

7. Do the same images work on Threads, LinkedIn, and Bluesky?

8. What are the most common mistakes?

9. Where does SupaBird fit in?

10. FAQ

What are the exact X profile picture and header sizes?

Upload a 400 x 400 profile photo and a 1500 x 500 header. Larger files with the same proportions also work, since X scales them down, but the shape has to be right. A square avatar and a 3:1 header avoid surprise crops.

Two definitions before going further:

• Profile picture (avatar): the small image next to every post, reply, and DM you send. Most people will see it at thumbnail size.

• Header image (banner): the wide image at the top of your profile page. People only see it when they click through to your profile.

That difference shapes everything below. The avatar has to read clearly at a tiny size. The header has a single job, which is to explain your account to someone already deciding whether to follow.

How does X crop your header and avatar?

X crops both images, and you can't fully control how. Your square avatar gets masked into a circle, which cuts off the corners. The header gets trimmed at the top and bottom on narrower screens, and your avatar sits on top of its lower-left area.

To stay safe:

1. Center the subject of your avatar. Anything in the four corners disappears inside the circle.

2. Keep header text in the middle band. Imagine the image split into horizontal thirds and put important content in the middle third.

3. Leave the lower-left corner empty. On both desktop and mobile, your profile photo overlaps that area.

4. Avoid the far left and right edges. Some screens trim the sides as well.

5. Check the preview on a phone, not only on desktop. Most profile visits happen on mobile, and the crop there is tighter.

The upload screen on X shows a crop box, but it doesn't match every device exactly. The only reliable check is to save the image, then open your profile on your phone and on a laptop. Expect to re-upload at least once.

What makes a profile picture work at tiny sizes?

A good avatar is recognizable at the size of a fingernail. That's how most people see it, scrolling replies at speed. Pick a single clear subject, use strong contrast, and don't put text in it.

• Use your face if you're a person. A close crop where your face fills most of the circle works better than a full-body shot.

• Use a plain or simple background. A solid color that contrasts with your skin and hair stands out in a busy feed.

• Skip text and slogans. They become unreadable once the image shrinks.

• Use a logo mark, not a full wordmark, for brands. Long logos turn into a smudge inside a circle.

• Keep it consistent. If people already know your face from YouTube or LinkedIn, reuse that photo so they recognize you.

• Don't change it often. People remember your account by the avatar more than by your name. Swapping it every few weeks resets that recognition.

If you post on X as a person, a real photo of you is the strongest default. Illustrated avatars can work for anonymous accounts, but they need the same contrast and simplicity.

Verdict: one face or one mark, high contrast, no text.

What should go in your header image?

Your header should tell a visitor what they'll get from following you, in under three seconds. Think of it as a billboard next to your bio, with your bio carrying the details. If you haven't written your bio yet, read how to write a bio that gets people to follow you first. The header should support the bio, not repeat it word for word.

Good header options:

• A one-line promise. For example, "Weekly breakdowns of SaaS pricing pages" in large, readable type.

• Proof of work. A screenshot of your product, a book cover, a podcast thumbnail, or a collage of past projects.

• Social proof you can back up. Logos of places you've been featured, but only if they're real and current.

• A clean visual identity. A brand color or texture, if your bio already does the explaining.

What to avoid:

• Small text that only works on desktop

• Five different messages competing for attention

• Default gray headers, which make an account look abandoned

• Busy photos that clash with your avatar

Verdict: one message, large type, nothing important in the lower left.

What should creators, indie hackers, SaaS founders, and marketers use?

Each audience needs its profile to answer a different question. Here's a starting point for each group.

Indie hackers who build in public on X can treat the header as a living progress board, updating it when they hit a milestone. And if you're still deciding what your account is about, settle that first. See what niche is actually winning on X. A header can't sell a focus you haven't picked.

Which tool should you use to make them?

Any editor that exports a 1500 x 500 image works. The right choice depends on how much design control you want and how often you'll update the header.

For most new accounts, a phone editor for the avatar and a template tool for the header is enough. Don't spend a weekend on design before your first post. A clean, simple profile beats a polished one you never finish.

Do the same images work on Threads, LinkedIn, and Bluesky?

Your avatar usually transfers well. Your header usually doesn't. A square photo with a centered face works almost everywhere, because most platforms display avatars as circles. Banners use different proportions on each platform, though, so a 1500 x 500 X header won't fit cleanly elsewhere.

• Threads: your profile is tied to an Instagram account, so your photo there usually comes from Instagram. There's no wide header like on X.

• LinkedIn: the personal background banner is much wider and shorter, commonly listed as 1584 x 396. Text placed for X will get cut off.

• Bluesky: it has an avatar and a wide banner like X. Upload it and check the preview before assuming your X header fits.

The practical approach is to use one avatar everywhere and make a separate banner export for each platform from the same design file.

What are the most common mistakes?

Most profile image problems come from designing on a desktop and never checking a phone.

1. Text hidden under the avatar. The classic one. Your best line lands in the lower left and gets covered.

2. Blurry uploads. A small image stretched to 1500 px wide looks soft. Start with something at least that wide.

3. Wrong aspect ratio. A 16:9 image uploaded as a header gets cropped hard at the top and bottom.

4. Expecting animation. X shows a still image for your profile picture and header, so an animated GIF won't play there.

5. Changing images on a verified account without checking the rules. X's verified accounts help page explains that changing your profile photo can affect your checkmark while the change is reviewed.

6. Mismatched avatar and header. Clashing colors make the profile look thrown together.

One honest limit: even with perfect dimensions, X sometimes changes its layout, and a header that looked fine last year can crop differently today. Recheck your profile on a phone every few months.

Where does SupaBird fit in?

A strong profile picture and header get you a follow from someone who visits your profile. They don't bring visitors there. That comes from posting regularly and replying in the right places, and that's the work SupaBird is built for.

SupaBird is a workspace for growing an audience on X, with cross-posting to Threads, LinkedIn, and Bluesky. Once your profile is set up, Ideas Lab suggests post ideas based on your interests, favorite creators, and personality. Engage finds posts worth replying to, which is how new accounts get their first profile visits. The calendar builds posting slots around active times. X Coach explains why a post did well or poorly, with suggestions like shortening it, fixing the timing, adding visuals, or changing the hook.

The workflow is simple. Set up your images and bio once, then use SupaBird to keep posting so people actually see that profile.

When it's the wrong tool: SupaBird doesn't edit photos or design avatars. For cropping a headshot or laying out a header, use a design tool like the ones above. If you haven't created your account yet, start with this guide on how to create a Twitter account. After that, plan what your first 10 tweets should be about so your new profile has something worth following.

FAQ

What size should my X profile picture be?

Use 400 x 400 pixels, square. X displays it as a circle for most accounts, so keep your face or logo centered and away from the corners. A larger square image is fine as long as it stays under the 2 MB limit.

What size is the X header image?

Use 1500 x 500 pixels, a 3:1 ratio, under 5 MB. Keep text and faces in the middle of the image. Your profile photo covers the lower-left area, and phones trim the top and bottom.

Why does my header look cut off on my phone?

Mobile screens are narrower, so X crops the header more tightly than on desktop. Move important text toward the center, make it larger, and recheck on your phone after uploading.

Should I use a photo of my face or a logo?

Use your face if the account is you, even if you run a company. People follow people more readily than logos. Use a simple logo mark only for an official brand or company account.

Can I use an animated GIF as my profile picture or header?

You can upload a GIF file, but X shows it as a still image on your profile. Design it to look good as a single frame.

How often should I change my profile picture?

Rarely. Your avatar is how people spot you in a busy feed, and frequent changes make that harder. Update it when your photo is clearly out of date or your brand changes, not as a routine refresh.

How does SupaBird help after my profile images are set up?

SupaBird helps you keep people coming to that profile. Ideas Lab suggests what to post, Engage finds posts worth replying to, the calendar plans posting slots around active times, and X Coach explains why a post did well or poorly. It doesn't design your avatar or header, so make those in a design tool first.