The Ultimate Twitter Image Size Guide for 2021 [Updated]
Feb 18, 2020 · For banners, Twitter recommends a 3:1 aspect ratio, 1500px X 500px size, and maximum file size of 5MB. Your banner image can be edited on desktops or mobile devices, but theme colors can be updated only on the Twitter website. Images can be in JPG, PNG, or GIF formats, but not animated GIFs.
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