Anonymous¹: how is it possible that this is 1080p and this in the link is only 720p?

Cheops: I actually just noticed that.. it's apparently the largest size one can post to tumblr.

upann: wrong: this is what you get on tumblr by default
https://68.media.tumblr.com/0ca886f648ea2b2a688cd393757063c6/tumblr_ov5f6obwXm1voxjtso1_1280.png

this is the actual full size:
https://media.tumblr.com/0ca886f648ea2b2a688cd393757063c6/tumblr_ov5f6obwXm1voxjtso1_raw.png

Use scripts to automatically load the raw file:
https://greasyfork.org/en/scripts/9014-tumblr-image-size

with this patch:
https://greasyfork.org/en/forum/discussion/27125/x