YouTube Channel Header size

According to YouTube, the best channel art size is 2560 pixels wide by x 1440 pixels tall. There are however other sizing requirements to keep in mind. These include:

• Minimum file dimensions: 2048 x 1152
• Minimum safe area for text and logos: 1546 x 423 pixels, with larger images possibly being crossed on certain devices or displays
• Maximum width: 2560 x 423 pixels, meaning that the “safe area” is always visible despite the size of the screen
• Maximum file size: 4MB (but file sizes can be smaller)

While using the 2560px by 1440px size ensures your channel art will fit properly on a TV screen, you also need to worry about how your channel art will look on desktops, tablets and mobile phones.

More detail at https://blog.snappa.com

Facebook Header Size

According to Facebook, your cover photo displays at 820 pixels wide by 312 pixels tall on computers and 640 pixels wide by 360 pixels tall on smartphones.

This is a great starting point, but of course it’s never quite that simple. It’s tricky because your Facebook cover displays differently on mobile and desktop devices.

Therefore, it is recommend using the dimensions 820px by 360px and to keep all text and graphics in the middle safe zone as per the specifications below:

More detail at https://blog.snappa.com

Twitter Header Size

Twitter’s recommended guidelines for header images.

• Header photo recommended dimensions are 1500px by 500px
• Photos can be in any of the following formats: JPG, GIF, or PNG. (Twitter does not support animated GIFs for profile or header images.

Here’s the problem…

Even if you follow these guidelines, your header image may not look right after you’ve uploaded it. That’s because you need to account for your profile picture and the “invisible area”.

In reality, the recommended Twitter header dimensions actually look like this:

Here’s a screenshot of a cover photo with my resolution at full width:

More detail at https://blog.snappa.com