diff --git a/src/vs/sessions/browser/parts/auxiliaryBarPart.ts b/src/vs/sessions/browser/parts/auxiliaryBarPart.ts
index 37798abc20b79..fe0b787bde16e 100644
--- a/src/vs/sessions/browser/parts/auxiliaryBarPart.ts
+++ b/src/vs/sessions/browser/parts/auxiliaryBarPart.ts
@@ -90,7 +90,7 @@ export class AuxiliaryBarPart extends AbstractPaneCompositePart {
 			return undefined;
 		}
 
-		return Math.max(width, 380);
+		return Math.max(width, 340);
 	}
 
 	readonly priority = LayoutPriority.Low;
diff --git a/src/vs/sessions/browser/workbench.ts b/src/vs/sessions/browser/workbench.ts
index a6d10ff5f50aa..e012ecf4941cc 100644
--- a/src/vs/sessions/browser/workbench.ts
+++ b/src/vs/sessions/browser/workbench.ts
@@ -892,8 +892,8 @@ export class Workbench extends Disposable implements IAgentWorkbenchLayoutServic
 
 		// Default sizes
 		const sideBarSize = 300;
-		const editorSize = 650;
-		const auxiliaryBarSize = 380;
+		const editorSize = 600;
+		const auxiliaryBarSize = 340;
 		const panelSize = 300;
 		const titleBarHeight = this.titleBarPartView?.minimumHeight ?? 30;