What are the ideal sizes for your profile photos, cover photos and posts on social media?
This is a cheat sheet of all the types and formats per social media channel.

All dimensions below are in pixels, width x height.

Facebook

Profile photo: 180 x 180
Cover image: 828 x 315
Post image: 1200 x 900
Shared link image: 1200 x 630
Event cover image: 1920 x 1080

Twitter

Header image: 1500 x 500
Profile image: 400 x 400
Timeline image: 506 x 253

Google+

Profile photo: 250 x 250
Cover image: 1080 x 608
Shared image: 506 pixels wide
Shared video: 506 x 284
Shared link image thumbnail: 150 x 150

Instagram

Profile photo: 110 x 110
Image thumbnail: 161 x 161
Shared images: 1080 x 1080
Shared videos: 1080 pixels wide

Pinterest

Profile photo: 180 x 180
Board cover image: 214 x 100
Pin preview: 238 pixels wide

LinkedIn

Profile photo 400 x 400
Banner image: 1850 x 200
Cover image: 1536 x 768
Shared image: 350 pixels wide
Shared link preview: 180 x 110
Logo image: 400 x 400

YouTube

Channel cover images: 2560 x 1440 (but varies by viewing platform)
Channel icon: 800 x 800
Video thumbnail: 1280 x 720