25+ Twitter Header Size Pics. Based on twitter, the perfect header size is 1500 x 500 pixels (px) with an aspect ratio of 3:1. Correct header size will definitely help twitter present your image better.
So if you made it 2100px x 700px, it would be absolutely fine too.
Optimal social media image sizes for 2020: Twitter header size, twitter cover photo size, twitter header dimensions. Here we have a massive space for an image on your. That seems easier enough, right?