Facebook Banner Image Size
For Facebook, a profile image need to always be 180 pixels x 180 pixels to appropriately load the framework of the image box. When adding a banner photo or cover photo, choose a picture that can be chopped to 851 x 315 to maintain a good resolution.
For Constant Contact, a profile image is not applicable. Nevertheless, a great banner image/cover image must be 600 pixels x less than 200 pixels.
For Instagram, your account photo need to be 161 x 161 pixels. Banner images and cover images are not applicable.
For Google +, your account picture need to be 250 x 250 pixels. To have an appealing banner image and/or cover photo, select a picture that is 2120 x 1192 pixels.
For Linkedin, a profile picture: must not surpass 100 x 60 pixels for a common logo OR 50 x 50 pixels for a square logo. Your dimensions are necessary to having your profile picture show properly. For a banner photo and/or cover photo, choose a photo that is 646 x 220 pixels.
For Pinterest, profile images must be cropped at 600 x 600 pixels. Banner pictures as well as cover photos are not applicable to Pinterest. When picking a thumbnail for your Pinterest board, select an image with dimensions of 222 x 150 pixels.
For Twitter, your profile image must be an also 400 x 400 pixels, and also your banner image/cover photo must be 1500 x 500 pixels.
For YouTube, your profile picture is instantly drawn from Google +. Your banner image/cover picture should be chopped at 2560 x 1224 pixels.