diff --git a/HellionChat/Ui/Components/Settings/Tabs/ChannelsTab.cs b/HellionChat/Ui/Components/Settings/Tabs/ChannelsTab.cs
index 4e1e338..38398a8 100644
--- a/HellionChat/Ui/Components/Settings/Tabs/ChannelsTab.cs
+++ b/HellionChat/Ui/Components/Settings/Tabs/ChannelsTab.cs
@@ -63,15 +63,16 @@ internal sealed class ChannelsTab
 
         if (ImGui.CollapsingHeader("Sidebar"))
         {
-            // Range matches Sidebar.MinSidebarWidth/MaxSidebarWidth (40-300). The
-            // lower bound sits just above the 38px icon-only threshold; the
-            // on-disk default (44) and the 150px expanded reference both fit.
+            // Bounds come from the constants rather than repeating the numbers,
+            // so the slider cannot drift away from the clamp in Sidebar.GetWidth.
+            // The stored value is unscaled; display scaling is applied where the
+            // sidebar is drawn.
             DrawSliderInt(
                 "Sidebar width",
                 () => Plugin.Config.SidebarWidth,
                 v => Plugin.Config.SidebarWidth = v,
-                40,
-                300
+                (int)Sidebar.MinSidebarWidth,
+                (int)Sidebar.MaxSidebarWidth
             );
         }
     }
diff --git a/HellionChat/Ui/Components/Sidebar.cs b/HellionChat/Ui/Components/Sidebar.cs
index fcbd0fe..0886e1d 100644
--- a/HellionChat/Ui/Components/Sidebar.cs
+++ b/HellionChat/Ui/Components/Sidebar.cs
@@ -27,9 +27,9 @@ internal sealed class Sidebar
     public const float MinSidebarWidth = 40f;
     public const float MaxSidebarWidth = 300f;
 
-    private const float RowHeight = 32f;
-    private const float PopOutHitWidth = 22f;
-    private const float GreetedHitWidth = 22f;
+    private static float RowHeight => Metrics.SidebarRowHeight;
+    private static float PopOutHitWidth => Metrics.SidebarPopOutHitWidth;
+    private static float GreetedHitWidth => Metrics.SidebarGreetedHitWidth;
 
     // B3-2 render observability: counts greeted glyphs actually drawn this frame.
     // Incremented ONLY in the real glyph branch in DrawRow; reset at Draw start.
@@ -85,6 +85,10 @@ internal sealed class Sidebar
         _pool = pool;
     }
 
+    // Both stay unscaled. The stored width and the switch threshold are user
+    // settings in design pixels, and SidebarModeAutoSwitchStep compares this
+    // return value against the raw bounds. Display scaling is applied once, at
+    // the single draw call site below.
     public bool IsExpanded(float windowWidth) =>
         windowWidth >= Plugin.Config.SidebarAutoSwitchThresholdPx;
 
@@ -111,12 +115,15 @@ internal sealed class Sidebar
 
         if (!_fonts.FontsReady)
         {
-            ImGui.Dummy(new Vector2(IconOnlyWidth, 0));
+            // A scale change triggers a font rebuild, so this branch is really
+            // hit while GlobalScale is moving -- an unscaled width here makes
+            // the sidebar jump.
+            ImGui.Dummy(new Vector2(Metrics.SidebarIconOnlyWidth, 0));
             return;
         }
 
         var expanded = IsExpanded(windowWidth);
-        var width = GetWidth(windowWidth);
+        var width = GetWidth(windowWidth) * Metrics.Scale;
         using var child = ImRaii.Child("##hellion-sidebar", new Vector2(width, 0));
         if (!child.Success)
             return;