Superscript or small caps?
Tiny text uses superscript letters that sit high on the line, like footnote numbers. Small caps are capital-shaped letters at lowercase height. Unicode has no tiny version of a few letters, so tiny q uses the look-alike ᑫ, and small-caps x stays a normal x.
Use it with care
Screen readers may read these characters strangely or skip them, and search won’t match them to normal words. Keep the important words, like your name or your shop name, in plain text somewhere too. Very old devices may show empty boxes.