diff --git a/src/Semi.Avalonia/Controls/DatePicker.axaml b/src/Semi.Avalonia/Controls/DatePicker.axaml
index 08bf185..c4b0e10 100644
--- a/src/Semi.Avalonia/Controls/DatePicker.axaml
+++ b/src/Semi.Avalonia/Controls/DatePicker.axaml
@@ -2,9 +2,10 @@
     xmlns="https://github.com/avaloniaui"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <Design.PreviewWith>
-        <Border Padding="20">
+        <StackPanel Margin="20">
             <DatePickerPresenter />
-        </Border>
+            <DatePicker Width="500" />
+        </StackPanel>
     </Design.PreviewWith>
     <ControlTheme x:Key="{x:Type DatePickerPresenter}" TargetType="DatePickerPresenter">
         <Setter Property="Width" Value="296" />
@@ -141,6 +142,7 @@
         <Setter Property="HorizontalAlignment" Value="Left" />
         <Setter Property="VerticalAlignment" Value="Center" />
         <Setter Property="MinHeight" Value="{DynamicResource DateTimePickerButtonDefaultHeight}" />
+        <Setter Property="MinWidth" Value="296" />
         <Setter Property="Template">
             <ControlTemplate TargetType="DatePicker">
                 <DataValidationErrors>
@@ -152,8 +154,8 @@
                             Name="PART_FlyoutButton"
                             Grid.Column="0"
                             Grid.ColumnSpan="2"
-                            Width="298"
-                            MinWidth="298"
+                            MinWidth="{TemplateBinding MinWidth}"
+                            MaxWidth="{TemplateBinding MaxWidth}"
                             MinHeight="{TemplateBinding MinHeight}"
                             HorizontalAlignment="Stretch"
                             VerticalAlignment="Stretch"
diff --git a/src/Semi.Avalonia/Controls/TimePicker.axaml b/src/Semi.Avalonia/Controls/TimePicker.axaml
index 9a8254f..13aedd4 100644
--- a/src/Semi.Avalonia/Controls/TimePicker.axaml
+++ b/src/Semi.Avalonia/Controls/TimePicker.axaml
@@ -2,9 +2,10 @@
     xmlns="https://github.com/avaloniaui"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
     <Design.PreviewWith>
-        <Border Padding="20">
+        <StackPanel Margin="20">
             <TimePickerPresenter />
-        </Border>
+            <TimePicker UseSeconds="True" Width="500" />
+        </StackPanel>
     </Design.PreviewWith>
     <ControlTheme x:Key="{x:Type TimePickerPresenter}" TargetType="TimePickerPresenter">
         <Setter Property="Width" Value="242" />
@@ -163,6 +164,7 @@
         <Setter Property="HorizontalAlignment" Value="Left" />
         <Setter Property="VerticalAlignment" Value="Center" />
         <Setter Property="MinHeight" Value="{DynamicResource DateTimePickerButtonDefaultHeight}" />
+        <Setter Property="MinWidth" Value="242" />
         <Setter Property="Template">
             <ControlTemplate>
                 <DataValidationErrors>
@@ -174,8 +176,8 @@
                             Name="PART_FlyoutButton"
                             Grid.Column="0"
                             Grid.ColumnSpan="2"
-                            Width="242"
-                            MinWidth="242"
+                            MinWidth="{TemplateBinding MinWidth}"
+                            MaxWidth="{TemplateBinding MaxWidth}"
                             MinHeight="{TemplateBinding MinHeight}"
                             HorizontalAlignment="Stretch"
                             VerticalAlignment="Stretch"