diff --git a/src/vs/editor/contrib/markdownRenderer/browser/markdownRenderer.ts b/src/vs/editor/contrib/markdownRenderer/browser/markdownRenderer.ts
index 2a323d76679..7220dbf1a4f 100644
--- a/src/vs/editor/contrib/markdownRenderer/browser/markdownRenderer.ts
+++ b/src/vs/editor/contrib/markdownRenderer/browser/markdownRenderer.ts
@@ -23,6 +23,7 @@ export interface IMarkdownRenderResult extends IDisposable {
 export interface IMarkdownRendererOptions {
 	editor?: ICodeEditor;
 	codeBlockFontFamily?: string;
+	codeBlockFontSize?: string;
 }
 
 /**
@@ -93,6 +94,10 @@ export class MarkdownRenderer {
 					element.style.fontFamily = this._options.codeBlockFontFamily;
 				}
 
+				if (this._options.codeBlockFontSize !== undefined) {
+					element.style.fontSize = this._options.codeBlockFontSize;
+				}
+
 				return element;
 			},
 			asyncRenderCallback: () => this._onDidRenderAsync.fire(),
diff --git a/src/vs/workbench/contrib/comments/browser/commentThreadZoneWidget.ts b/src/vs/workbench/contrib/comments/browser/commentThreadZoneWidget.ts
index 0e41198ccb2..c6a047179b0 100644
--- a/src/vs/workbench/contrib/comments/browser/commentThreadZoneWidget.ts
+++ b/src/vs/workbench/contrib/comments/browser/commentThreadZoneWidget.ts
@@ -193,7 +193,7 @@ export class ReviewZoneWidget extends ZoneWidget implements ICommentThreadWidget
 			this._scopedInstantiationService,
 			this._commentThread as unknown as languages.CommentThread<IRange | ICellRange>,
 			this._pendingComment,
-			{ editor: this.editor },
+			{ editor: this.editor, codeBlockFontSize: '' },
 			this._commentOptions,
 			{
 				actionRunner: () => {