.cm-s-xx-small.CodeMirror {
font-size: xx-small; 
}

.cm-s-x-small.CodeMirror { 
font-size: x-small; 
}

.cm-s-small.CodeMirror { 
font-size: small; 
}

.cm-s-medium.CodeMirror {
font-size: medium; 
}

.cm-s-large.CodeMirror { 
font-size: large; 
}

.cm-s-xx-large.CodeMirror { 
font-size: xx-large; 
}