.redactor-dropdown-superscript span,
.redactor-dropdown-subscript span,
.redactor-dropdown-smallprint span {
  font-size: 0.75em;
}

.redactor-editor sup,
.redactor-editor sub {
  position: relative;
  vertical-align: baseline;
  top: -0.5em;
  font-size: 0.75em;
}

.redactor-editor sub {
  top: 0.3em;
}