Edit in JSFiddle

$("select").multiselect({
   selectedText: "# of # selected"
});

<select multiple>
<option value="1">Option 1</option>
<option value="2">Option 2</option>
<option value="3">Option 3</option>
<option value="4">Option 4</option>
<option value="5">Option 5</option>
<option value="6">Option 6</option>
<option value="7">Option 7</option>
<option value="8">Option 8</option>
<option value="9">Option 9</option>
<option value="10">Option 10</option>
</select>

body {
    font-size: 13px;
}