diff --git a/src/controls/plugins.qmltypes b/src/controls/plugins.qmltypes
--- a/src/controls/plugins.qmltypes
+++ b/src/controls/plugins.qmltypes
@@ -139,12 +139,17 @@
         Property { name: "focusColor"; type: "QColor" }
         Property { name: "hoverColor"; type: "QColor" }
         Property { name: "defaultFont"; type: "QFont"; isReadonly: true }
+        Property { name: "smallestFont"; type: "QFont"; isReadonly: true }
         Property { name: "palette"; type: "QPalette"; isReadonly: true }
         Signal { name: "colorsChanged" }
         Signal {
             name: "defaultFontChanged"
             Parameter { name: "font"; type: "QFont" }
         }
+        Signal {
+            name: "smallestFontChanged"
+            Parameter { name: "font"; type: "QFont" }
+        }
         Signal {
             name: "colorSetChanged"
             Parameter { name: "colorSet"; type: "Kirigami::PlatformTheme::ColorSet" }
@@ -1856,6 +1861,7 @@
         Property { name: "complementaryHoverColor"; type: "QColor" }
         Property { name: "complementaryFocusColor"; type: "QColor" }
         Property { name: "defaultFont"; type: "QFont" }
+        Property { name: "smallestFont"; type: "QFont" }
         Property { name: "children"; type: "QObject"; isList: true; isReadonly: true }
         Method {
             name: "__propagateColorSet"
diff --git a/src/libkirigami/platformtheme.h b/src/libkirigami/platformtheme.h
--- a/src/libkirigami/platformtheme.h
+++ b/src/libkirigami/platformtheme.h
@@ -168,6 +168,7 @@
 
     // font and palette
     Q_PROPERTY(QFont defaultFont READ defaultFont NOTIFY defaultFontChanged)
+    Q_PROPERTY(QFont smallestFont READ smallestFont NOTIFY smallestFontChanged)
     //Active palette
     Q_PROPERTY(QPalette palette READ palette NOTIFY paletteChanged)
 
@@ -230,6 +231,7 @@
     QColor hoverColor() const;
 
     QFont defaultFont() const;
+    QFont smallestFont() const;
 
     //this may is used by the desktop QQC2 to set the styleoption palettes
     QPalette palette() const;
@@ -270,6 +272,7 @@
     //TODO: parameters to signals as this is also a c++ api
     void colorsChanged();
     void defaultFontChanged(const QFont &font);
+    void smallestFontChanged(const QFont &font);
     void colorSetChanged(Kirigami::PlatformTheme::ColorSet colorSet);
     void colorGroupChanged(Kirigami::PlatformTheme::ColorGroup colorGroup);
     void paletteChanged(const QPalette &pal);
diff --git a/src/libkirigami/platformtheme.cpp b/src/libkirigami/platformtheme.cpp
--- a/src/libkirigami/platformtheme.cpp
+++ b/src/libkirigami/platformtheme.cpp
@@ -16,6 +16,7 @@
 #include <QPluginLoader>
 #include <QDir>
 #include <QQuickStyle>
+#include <QFontDatabase>
 
 namespace Kirigami {
 
@@ -608,8 +609,13 @@
 
     d->font = font;
     emit defaultFontChanged(font);
+    emit smallestFontChanged(smallestFont());
 }
 
+QFont PlatformTheme::smallestFont() const
+{
+    return QFontDatabase::systemFont(QFontDatabase::SmallestReadableFont);
+}
 
 #define PROPAGATECUSTOMCOLOR(colorName, color)\
             for (PlatformTheme *t : qAsConst(d->m_childThemes)) {\