app/pb_kits/playbook/pb_user/docs/_user_font_options_react

Passing a nameStyle prop changes the type kit used for the user name. You can choose between title, body, caption, and detail. title is the default.

Passing a titleStyle prop changes the type kit used for the user title. You can choose between body, caption, and detail. body is the default.

The size of the caption is determined by the size prop.