Dynamically Generated Dynamic Menu Items Width Question

I have the following Menu:
<asp:Menu ID="MainMenu" runat="server" Orientation="Horizontal" DynamicVerticalOffset="2" DynamicHorizontalOffset="2" StaticEnableDefaultPopOutImage="false" DynamicEnableDefaultPopOutImage="false" > <StaticMenuItemStyle BackColor="#0099cc" ForeColor="#eeeeee" Font-Names="Arial" Font-Size="11" Height="18" HorizontalPadding="10" VerticalPadding="3" /> <StaticHoverStyle BackColor="#336699" ForeColor="#ffffff" Font-Names="Arial" Font-Size="11" /> <DynamicMenuItemStyle BackColor="#0099cc" ForeColor="#eeeeee" Font-Names="Arial" Font-Size="10" Height="18" HorizontalPadding="10" Vertica ...