Change CSS Font Size and Make Font bold in ASP.Net DropDownList

<style type = "text/css">
        .DropDown
        {
            font-weight:bold;
            font-size: 12pt;
        }
    </style>
    <asp:DropDownList ID = "ddl" runat = "server" CssClass = "DropDown">
    <asp:ListItem Text = "One" Value = "1" />
    <asp:ListItem Text = "Two" Value = "2" />
    <asp:ListItem Text = "Three" Value = "3" />
    </asp:DropDownList>

Font Bold will not work in IE as it does not support it for DropDown Items