diff --git a/demo/Semi.Avalonia.Demo/Pages/CalendarDatePickerDemo.axaml b/demo/Semi.Avalonia.Demo/Pages/CalendarDatePickerDemo.axaml
index 44a1413..4730e62 100644
--- a/demo/Semi.Avalonia.Demo/Pages/CalendarDatePickerDemo.axaml
+++ b/demo/Semi.Avalonia.Demo/Pages/CalendarDatePickerDemo.axaml
@@ -8,11 +8,22 @@
     d:DesignWidth="800"
     mc:Ignorable="d">
     <StackPanel HorizontalAlignment="Left" Spacing="20">
-        <CalendarDatePicker />
-        <CalendarDatePicker Classes="ClearButton" Width="200" />
+        <StackPanel Orientation="Horizontal">
+            <CalendarDatePicker Classes="Large" />
+            <CalendarDatePicker />
+            <CalendarDatePicker Classes="Small" />
+        </StackPanel>
+
+        <StackPanel Orientation="Horizontal">
+            <CalendarDatePicker IsEnabled="False" />
+            <CalendarDatePicker Classes="Bordered" />
+            <CalendarDatePicker Classes="Bordered" IsEnabled="False" />
+        </StackPanel>
+
         <CalendarDatePicker Width="500" />
-        <CalendarDatePicker Classes="Large" />
-        <CalendarDatePicker Classes="Small" />
+
+        <CalendarDatePicker Classes="ClearButton" Width="200" />
+
         <CalendarDatePicker
             Name="DatePicker2"
             Margin="0,0,0,8"
@@ -23,9 +34,5 @@
             CustomDateFormatString="ddd, MMM d"
             SelectedDateFormat="Custom" />
         <CalendarDatePicker Margin="0,0,0,8" Watermark="Watermark" />
-
-        <CalendarDatePicker IsEnabled="False" />
-        <CalendarDatePicker Classes="Bordered" />
-        <CalendarDatePicker Classes="Bordered" IsEnabled="False" />
     </StackPanel>
-</UserControl>
+</UserControl>
\ No newline at end of file
diff --git a/src/Semi.Avalonia/Controls/CalendarDatePicker.axaml b/src/Semi.Avalonia/Controls/CalendarDatePicker.axaml
index 044c4ef..5068b3d 100644
--- a/src/Semi.Avalonia/Controls/CalendarDatePicker.axaml
+++ b/src/Semi.Avalonia/Controls/CalendarDatePicker.axaml
@@ -9,7 +9,7 @@
         <Setter Property="BorderBrush" Value="{DynamicResource CalendarDatePickerBorderBrush}" />
         <Setter Property="BorderThickness" Value="{DynamicResource CalendarDatePickerBorderThickness}" />
         <Setter Property="CornerRadius" Value="{DynamicResource CalendarDatePickerCornerRadius}" />
-        <Setter Property="BackgroundSizing" Value="InnerBorderEdge"/>
+        <Setter Property="BackgroundSizing" Value="OuterBorderEdge"/>
         <Setter Property="IsTodayHighlighted" Value="True" />
         <Setter Property="HorizontalAlignment" Value="Left" />
         <Setter Property="VerticalAlignment" Value="Center" />