GridViewDataSourceId.aspx font size:
<html>
<head>
<title>Binding a GridView to a Data Source Control</title>
<link rel="stylesheet" href="/shared/netdemos.css">
</head>

<body>
<!-- #include virtual="~/shared/top.inc" -->
<div class="header"><h2>Binding a GridView to a Data Source Control</h2></div>
<hr size=1 width=92%>

<form runat="server">
<div align="center">

   <asp:gridview id="CustomersGridView" runat="server"
      datasourceid="customers"
      width=90% cellpadding=5
      font-size="9pt"
      enableviewstate=false>

      <headerstyle backcolor="steelblue"
         forecolor="beige" />

      <rowstyle verticalalign="top" />

   </asp:gridview>

   <asp:sqldatasource id="customers" runat="server"
      selectcommand="SELECT CustomerID, CompanyName, Address, City, PostalCode, Country FROM Customers"
      connectionstring="<%$ ConnectionStrings:aspnet %>"
      datasourcemode="DataReader" />

</div>
</form>

<hr size=1 width=92%>
<!-- #include virtual="~/shared/viewsrc.inc" -->

</body>
</html>