Calender size changing while executing the ASP file

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C#

ASP.NET

my asp.net page contain calender. while executing in the output calender displaying as large

What I have tried:

<asp:Calendar ID="Calendar3" runat="server" BackColor="#CCFF33" BorderColor="#3399FF"
CaptionAlign="Top" FirstDayOfWeek="Monday" ondayrender="Calendar3_DayRender"
onselectionchanged="Calendar3_SelectionChanged" VisibleDate="2016-08-24">
<dayheaderstyle backcolor="#CC99FF" bordercolor="#9999FF">
<daystyle backcolor="White">
<othermonthdaystyle backcolor="#666633" bordercolor="#FFFFCC">
Font-Size="Smaller" />

<SelectedDayStyle BackColor="#FF6699" />
<weekenddaystyle backcolor="#FFCCFF">