Looks like 540px wide is the dashboard size image.
High quality should be 1280px wide?

Looks like you’ll want to target 540px for the dashboard view (assuming that is where the most notes come from?).
Looks like 540px wide is the dashboard size image.
High quality should be 1280px wide?

Looks like you’ll want to target 540px for the dashboard view (assuming that is where the most notes come from?).