Below is the code I am using:
<select id="accessList" name="accessList" multiple="multiple" style="position:relative;left:5px;overflow-x:auto;width:200px">
<option value="36453" style="text-align:left;width:auto">TestGroupterminal121251221231321321321231321321231111111111111111111111111111111111111111111111111111111111111111111111111111111111111</option>
</select>
When an option is selected, the complete value is not displayed.
Image below compares non-selected vs selected situation: