Add a combo box to select the size of systray popups.

applets/systemtray/package/contents/config/main.xml

@@ -37,6 +37,10 @@
       <label>Whether the popup should remain open when another window is activated</label>
       <default>false</default>
     </entry>
+    <entry name="plasmoidSize" type="int">
+      <label>The size of the popup containing the plasmoid</label>
+      <default>10</default>
+    </entry>
   </group>
 
 </kcfg>

applets/systemtray/package/contents/ui/ConfigGeneral.qml

@@ -14,6 +14,7 @@ import org.kde.kirigami 2.13 as Kirigami
 ColumnLayout {
     property bool cfg_scaleIconsToFit
     property int cfg_iconSpacing
+    property int cfg_plasmoidSize
 
     Kirigami.FormLayout {
         Layout.fillHeight: true
@@ -81,5 +82,38 @@ ColumnLayout {
             text: i18nc("@info:usagetip under a combobox when tablet mode is on", "Automatically set to Large when in tablet mode")
             font: PlasmaCore.Theme.smallestFont
         }
+
+        QQC2.ComboBox {
+            Kirigami.FormData.label: i18nc("@label:listbox The size of the plasmoid popup", "Popup size:")
+            model: [
+                {
+                    "label": i18nc("@item:inlistbox Popup size", "Small"),
+                    "plasmoidSize": 10
+                },
+                {
+                    "label": i18nc("@item:inlistbox Popup size", "Normal"),
+                    "plasmoidSize": 13
+                },
+                {
+                    "label": i18nc("@item:inlistbox Popup size", "Large"),
+                    "plasmoidSize": 16
+                }
+            ]
+            textRole: "label"
+            enabled: !Kirigami.Settings.tabletMode
+
+            currentIndex: {
+                if (Kirigami.Settings.tabletMode)
+                    return 1; // Small
+
+                switch (cfg_plasmoidSize) {
+                    case 10: return 0; // Small
+                    case 13: return 1; // Normal
+                    case 16: return 2; // Large
+                }
+            }
+
+            onActivated: cfg_plasmoidSize = model[currentIndex]["plasmoidSize"]
+        }
     }
 }

applets/systemtray/package/contents/ui/ExpandedRepresentation.qml

@@ -18,8 +18,9 @@ import org.kde.plasma.extras 2.0 as PlasmaExtras
 Item {
     id: popup
     //set width/height to avoid useless Dialog resize
-    readonly property int defaultWidth: PlasmaCore.Units.gridUnit * 24
-    readonly property int defaultHeight: PlasmaCore.Units.gridUnit * 24
+    readonly property int sizeFactor: plasmoid.configuration.plasmoidSize ?? 1
+    readonly property int defaultWidth: PlasmaCore.Units.gridUnit * 24 * sizeFactor/10
+    readonly property int defaultHeight: PlasmaCore.Units.gridUnit * 24 * sizeFactor/10
 
     width: defaultWidth
     Layout.minimumWidth: defaultWidth