diff --git a/src/vs/editor/standalone/browser/simpleServices.ts b/src/vs/editor/standalone/browser/simpleServices.ts
index a2ae342dde3..233f847e5e0 100644
--- a/src/vs/editor/standalone/browser/simpleServices.ts
+++ b/src/vs/editor/standalone/browser/simpleServices.ts
@@ -42,7 +42,7 @@ import { IProgressRunner, IEditorProgressService } from 'vs/platform/progress/co
 import { ITelemetryInfo, ITelemetryService } from 'vs/platform/telemetry/common/telemetry';
 import { IWorkspace, IWorkspaceContextService, IWorkspaceFolder, IWorkspaceFoldersChangeEvent, WorkbenchState, WorkspaceFolder } from 'vs/platform/workspace/common/workspace';
 import { ISingleFolderWorkspaceIdentifier, IWorkspaceIdentifier } from 'vs/platform/workspaces/common/workspaces';
-import { ILayoutService, IDimension } from 'vs/platform/layout/browser/layoutService';
+import { ILayoutService } from 'vs/platform/layout/browser/layoutService';
 import { SimpleServicesNLS } from 'vs/editor/common/standaloneStrings';
 import { ClassifiedEvent, StrictPropertyCheck, GDPRClassification } from 'vs/platform/telemetry/common/gdprTypings';
 import { basename } from 'vs/base/common/resources';
@@ -732,8 +732,8 @@ export class SimpleLayoutService implements ILayoutService {
 
 	public onLayout = Event.None;
 
-	private _dimension?: IDimension;
-	get dimension(): IDimension {
+	private _dimension?: dom.IDimension;
+	get dimension(): dom.IDimension {
 		if (!this._dimension) {
 			this._dimension = dom.getClientArea(window.document.body);
 		}
diff --git a/src/vs/platform/layout/browser/layoutService.ts b/src/vs/platform/layout/browser/layoutService.ts
index 988c518cfff..39f3f1da8eb 100644
--- a/src/vs/platform/layout/browser/layoutService.ts
+++ b/src/vs/platform/layout/browser/layoutService.ts
@@ -5,14 +5,10 @@
 
 import { Event } from 'vs/base/common/event';
 import { createDecorator } from 'vs/platform/instantiation/common/instantiation';
+import { IDimension } from 'vs/base/browser/dom';
 
 export const ILayoutService = createDecorator<ILayoutService>('layoutService');
 
-export interface IDimension {
-	readonly width: number;
-	readonly height: number;
-}
-
 export interface ILayoutService {
 
 	_serviceBrand: undefined;
diff --git a/src/vs/workbench/browser/layout.ts b/src/vs/workbench/browser/layout.ts
index ae802119f6f..3fa67173cc3 100644
--- a/src/vs/workbench/browser/layout.ts
+++ b/src/vs/workbench/browser/layout.ts
@@ -5,7 +5,7 @@
 
 import { Disposable, DisposableStore } from 'vs/base/common/lifecycle';
 import { Emitter } from 'vs/base/common/event';
-import { EventType, addDisposableListener, addClass, removeClass, isAncestor, getClientArea, Dimension, toggleClass, position, size } from 'vs/base/browser/dom';
+import { EventType, addDisposableListener, addClass, removeClass, isAncestor, getClientArea, Dimension, toggleClass, position, size, IDimension } from 'vs/base/browser/dom';
 import { onDidChangeFullscreen, isFullscreen } from 'vs/base/browser/browser';
 import { IBackupFileService } from 'vs/workbench/services/backup/common/backup';
 import { Registry } from 'vs/platform/registry/common/platform';
@@ -30,7 +30,6 @@ import { IWorkbenchEnvironmentService } from 'vs/workbench/services/environment/
 import { IEditorService, IResourceEditorInputType } from 'vs/workbench/services/editor/common/editorService';
 import { IEditorGroupsService } from 'vs/workbench/services/editor/common/editorGroupsService';
 import { SerializableGrid, ISerializableView, ISerializedGrid, Orientation, ISerializedNode, ISerializedLeafNode, Direction, IViewSize } from 'vs/base/browser/ui/grid/grid';
-import { IDimension } from 'vs/platform/layout/browser/layoutService';
 import { Part } from 'vs/workbench/browser/part';
 import { IStatusbarService } from 'vs/workbench/services/statusbar/common/statusbar';
 import { IActivityBarService } from 'vs/workbench/services/activityBar/browser/activityBarService';
diff --git a/src/vs/workbench/browser/part.ts b/src/vs/workbench/browser/part.ts
index a48f22d44cd..dfab3bc5cfc 100644
--- a/src/vs/workbench/browser/part.ts
+++ b/src/vs/workbench/browser/part.ts
@@ -6,9 +6,8 @@
 import 'vs/css!./media/part';
 import { Component } from 'vs/workbench/common/component';
 import { IThemeService, IColorTheme } from 'vs/platform/theme/common/themeService';
-import { Dimension, size } from 'vs/base/browser/dom';
+import { Dimension, size, IDimension } from 'vs/base/browser/dom';
 import { IStorageService } from 'vs/platform/storage/common/storage';
-import { IDimension } from 'vs/platform/layout/browser/layoutService';
 import { ISerializableView, IViewSize } from 'vs/base/browser/ui/grid/grid';
 import { Event, Emitter } from 'vs/base/common/event';
 import { IWorkbenchLayoutService } from 'vs/workbench/services/layout/browser/layoutService';
diff --git a/src/vs/workbench/contrib/watermark/browser/watermark.ts b/src/vs/workbench/contrib/watermark/browser/watermark.ts
index 9a84c9a84c1..05830522e42 100644
--- a/src/vs/workbench/contrib/watermark/browser/watermark.ts
+++ b/src/vs/workbench/contrib/watermark/browser/watermark.ts
@@ -26,7 +26,6 @@ import * as dom from 'vs/base/browser/dom';
 import { KeybindingLabel } from 'vs/base/browser/ui/keybindingLabel/keybindingLabel';
 import { IEditorGroupsService } from 'vs/workbench/services/editor/common/editorGroupsService';
 import { CommandsRegistry } from 'vs/platform/commands/common/commands';
-import { IDimension } from 'vs/platform/layout/browser/layoutService';
 import { TERMINAL_COMMAND_ID } from 'vs/workbench/contrib/terminal/common/terminal';
 import { assertIsDefined } from 'vs/base/common/types';
 import { workbenchConfigurationNodeBase } from 'vs/workbench/common/configuration';
@@ -157,7 +156,7 @@ export class WatermarkContribution extends Disposable implements IWorkbenchContr
 		this.handleEditorPartSize(container, this.editorGroupsService.contentDimension);
 	}
 
-	private handleEditorPartSize(container: HTMLElement, dimension: IDimension): void {
+	private handleEditorPartSize(container: HTMLElement, dimension: dom.IDimension): void {
 		if (dimension.height <= 478) {
 			dom.addClass(container, 'max-height-478px');
 		} else {
diff --git a/src/vs/workbench/test/browser/workbenchTestServices.ts b/src/vs/workbench/test/browser/workbenchTestServices.ts
index 0b47f216620..7672be5ade0 100644
--- a/src/vs/workbench/test/browser/workbenchTestServices.ts
+++ b/src/vs/workbench/test/browser/workbenchTestServices.ts
@@ -56,7 +56,7 @@ import { IEditorService, IOpenEditorOverrideHandler, ISaveEditorsOptions, IRever
 import { ICodeEditorService } from 'vs/editor/browser/services/codeEditorService';
 import { IEditorRegistry, EditorDescriptor, Extensions } from 'vs/workbench/browser/editor';
 import { EditorGroup } from 'vs/workbench/common/editor/editorGroup';
-import { Dimension } from 'vs/base/browser/dom';
+import { Dimension, IDimension } from 'vs/base/browser/dom';
 import { ILogService, NullLogService } from 'vs/platform/log/common/log';
 import { ILabelService } from 'vs/platform/label/common/label';
 import { timeout } from 'vs/base/common/async';
@@ -66,7 +66,6 @@ import { IViewlet } from 'vs/workbench/common/viewlet';
 import { IStorageService, StorageScope } from 'vs/platform/storage/common/storage';
 import { isLinux } from 'vs/base/common/platform';
 import { LabelService } from 'vs/workbench/services/label/common/labelService';
-import { IDimension } from 'vs/platform/layout/browser/layoutService';
 import { Part } from 'vs/workbench/browser/part';
 import { IPanelService } from 'vs/workbench/services/panel/common/panelService';
 import { IPanel } from 'vs/workbench/common/panel';