Small letters in superscript in Gmail subject line

Question

Twitter sends email notifications with the subject in small letters raised above the base line:

How can we do this in our messages?

Answer 1

They insert Unicode superscripts in subject line. You can do, too: there are sub/superscript generators online, for example this one. Example:

da_667ᴺᵉᶜᵏᵇᵉᵃʳᵈ ᵗᵒᵒ ʰᵃᶦʳʸ ᵗᵒ ʰᶦᵈᵉ Tweeted:

In principle, one can type these directly but you'd have to know the Unicode code points and how to use them to enter characters on your device.