Your profile picture is often someone’s first introduction to you on social media. After that, it's usually your header image, and then your bio. You should choose these pictures carefully. And to make sure your images aren't getting cut off or weirdly cropped, you should know the standard dimensions each platform allows.
You'll probably be safe using square profile pictures across all your profiles, but banners and headers vary a bit. Below, you'll find a cheat sheet with the dimensions for most of the major social media platforms (as of Oct. 2017).
Facebook cover photo: 828 x 315 px
Facebook event page cover: 784 x 295 px
Twitter banner: 1500 x 500 px
LinkedIn banner: 1400 x 425 px
Etsy store banner: 1200 x 300 px
YouTube channel header: 2560 x 1440 px
You can use header images to promote news and events, like your latest book, or change them seasonally/to coincide with holidays. But there’s nothing wrong with using one, nice looking, on-brand image and keeping it consistent. You can use a slogan or mantra in some cool typography, or show off some creative work you’re proud of.
You can change your profile picture too, but it helps to be consistent. You want people to recognize you from platform to platform. For a brand, this is easy if you have a logo. For an individual profile, you can go with the old standby of a professional headshot, or a more stylized option, like your bitmoji or an artistic portrait.
Check out how your profile and header images look on both desktop and mobile. There will often be a little bit of overlap, so make sure no important text or other elements are getting covered up.
Now that your profile looks nice, make sure you have a good bio.
Aspiring Dog Parent