diff --git a/src/Avalonia.Themes.Default/Accents/BaseDark.xaml b/src/Avalonia.Themes.Default/Accents/BaseDark.xaml
index 44dfb9ea48..5f18bac44a 100644
--- a/src/Avalonia.Themes.Default/Accents/BaseDark.xaml
+++ b/src/Avalonia.Themes.Default/Accents/BaseDark.xaml
@@ -72,5 +72,8 @@
 
         <sys:Double x:Key="ScrollBarThickness">18</sys:Double>
         <sys:Double x:Key="ScrollBarThumbThickness">8</sys:Double>
+
+        <sys:Double x:Key="IconElementThemeHeight">20</sys:Double>
+        <sys:Double x:Key="IconElementThemeWidth">20</sys:Double>
     </Style.Resources>
 </Style>
diff --git a/src/Avalonia.Themes.Default/Accents/BaseLight.xaml b/src/Avalonia.Themes.Default/Accents/BaseLight.xaml
index 9ed3207235..30c6d39856 100644
--- a/src/Avalonia.Themes.Default/Accents/BaseLight.xaml
+++ b/src/Avalonia.Themes.Default/Accents/BaseLight.xaml
@@ -75,5 +75,8 @@
 
         <sys:Double x:Key="ScrollBarThickness">18</sys:Double>
         <sys:Double x:Key="ScrollBarThumbThickness">8</sys:Double>
+
+        <sys:Double x:Key="IconElementThemeHeight">20</sys:Double>
+        <sys:Double x:Key="IconElementThemeWidth">20</sys:Double>
     </Style.Resources>
 </Style>
diff --git a/src/Avalonia.Themes.Fluent/Accents/Base.xaml b/src/Avalonia.Themes.Fluent/Accents/Base.xaml
index 46488c1c57..134e804c53 100644
--- a/src/Avalonia.Themes.Fluent/Accents/Base.xaml
+++ b/src/Avalonia.Themes.Fluent/Accents/Base.xaml
@@ -20,5 +20,7 @@
     <Thickness x:Key="TextControlBorderThemeThickness">1</Thickness>
     <Thickness x:Key="TextControlBorderThemeThicknessFocused">2</Thickness>
     <Thickness x:Key="TextControlThemePadding">10,6,6,5</Thickness>
+    <sys:Double x:Key="IconElementThemeHeight">20</sys:Double>
+    <sys:Double x:Key="IconElementThemeWidth">20</sys:Double>
   </Style.Resources>
 </Style>