diff --git a/src/NotificationList/Content.tsx b/src/NotificationList/Content.tsx
index 700fd2f..159dc51 100644
--- a/src/NotificationList/Content.tsx
+++ b/src/NotificationList/Content.tsx
@@ -4,10 +4,20 @@ import * as React from 'react';
 export interface ContentProps extends React.HTMLAttributes<HTMLDivElement> {
   listPrefixCls: string;
   height: number;
+  topNoticeHeight?: number;
+  topNoticeWidth?: number;
 }
 
 const Content = React.forwardRef<HTMLDivElement, ContentProps>((props, ref) => {
-  const { listPrefixCls, height, className, style, ...restProps } = props;
+  const {
+    listPrefixCls,
+    height,
+    topNoticeHeight = 0,
+    topNoticeWidth = 0,
+    className,
+    style,
+    ...restProps
+  } = props;
 
   const contentPrefixCls = `${listPrefixCls}-content`;
 
@@ -18,15 +28,23 @@ const Content = React.forwardRef<HTMLDivElement, ContentProps>((props, ref) => {
 
   prevHeightRef.current = height;
 
+  // ========================= Style ==========================
+  const contentStyle: React.CSSProperties & {
+    '--top-notificiation-height': string;
+    '--top-notificiation-width': string;
+  } = {
+    ...style,
+    height,
+    '--top-notificiation-height': `${topNoticeHeight}px`,
+    '--top-notificiation-width': `${topNoticeWidth}px`,
+  };
+
   // ========================= Render =========================
   return (
     <div
       {...restProps}
       className={clsx(contentPrefixCls, `${contentPrefixCls}-${heightStatus}`, className)}
-      style={{
-        ...style,
-        height,
-      }}
+      style={contentStyle}
       ref={ref}
     />
   );
diff --git a/src/NotificationList/index.tsx b/src/NotificationList/index.tsx
index 08c3d68..2063828 100644
--- a/src/NotificationList/index.tsx
+++ b/src/NotificationList/index.tsx
@@ -210,11 +210,8 @@ const NotificationList: React.FC<NotificationListProps> = (props) => {
   // ====================== List Measure ======================
   const [gap, setGap] = React.useState(0);
   const contentRef = React.useRef<HTMLDivElement>(null);
-  const [notificationPosition, setNodeSize, totalHeight] = useListPosition(
-    configList,
-    stackPosition,
-    gap,
-  );
+  const [notificationPosition, setNodeSize, totalHeight, topNoticeHeight, topNoticeWidth] =
+    useListPosition(configList, stackPosition, gap);
   const hasConfigList = !!configList.length;
 
   React.useEffect(() => {
@@ -259,6 +256,8 @@ const NotificationList: React.FC<NotificationListProps> = (props) => {
       <Content
         listPrefixCls={listPrefixCls}
         height={totalHeight}
+        topNoticeHeight={topNoticeHeight}
+        topNoticeWidth={topNoticeWidth}
         className={classNames?.listContent}
         style={styles?.listContent}
         ref={contentRef}
diff --git a/src/hooks/useListPosition/index.ts b/src/hooks/useListPosition/index.ts
index 3d0b2c8..131c42f 100644
--- a/src/hooks/useListPosition/index.ts
+++ b/src/hooks/useListPosition/index.ts
@@ -12,11 +12,13 @@ export default function useListPosition(
 ) {
   const [sizeMap, setNodeSize] = useSizes();
 
-  const [notificationPosition, totalHeight] = React.useMemo(() => {
+  const [notificationPosition, totalHeight, topNoticeHeight, topNoticeWidth] = React.useMemo(() => {
     let offsetY = 0;
     let nextTotalHeight = 0;
     const stackThreshold = stack?.threshold ?? 0;
     const nextNotificationPosition = new Map<string, number>();
+    let nextTopNoticeHeight: number | undefined;
+    let nextTopNoticeWidth: number | undefined;
 
     configList
       .slice()
@@ -29,6 +31,11 @@ export default function useListPosition(
 
         nextNotificationPosition.set(key, y);
 
+        if (index === 0) {
+          nextTopNoticeHeight = height;
+          nextTopNoticeWidth = sizeMap[key]?.width ?? 0;
+        }
+
         if (!stack || index < stackThreshold) {
           nextTotalHeight = Math.max(nextTotalHeight, y + height);
         }
@@ -40,8 +47,13 @@ export default function useListPosition(
         }
       });
 
-    return [nextNotificationPosition, nextTotalHeight] as const;
+    return [
+      nextNotificationPosition,
+      nextTotalHeight,
+      nextTopNoticeHeight,
+      nextTopNoticeWidth,
+    ] as const;
   }, [configList, gap, sizeMap, stack]);
 
-  return [notificationPosition, setNodeSize, totalHeight] as const;
+  return [notificationPosition, setNodeSize, totalHeight, topNoticeHeight, topNoticeWidth] as const;
 }
diff --git a/tests/index.test.tsx b/tests/index.test.tsx
index e45e5d5..8de40c7 100644
--- a/tests/index.test.tsx
+++ b/tests/index.test.tsx
@@ -866,6 +866,48 @@ describe('Notification.Basic', () => {
     expect(document.querySelector('.rc-notification-list-content')).toHaveClass('bamboo');
   });
 
+  it('should expose top notice size on listContent', () => {
+    const offsetHeightSpy = vi
+      .spyOn(HTMLElement.prototype, 'offsetHeight', 'get')
+      .mockImplementation(function offsetHeight(this: HTMLElement) {
+        if (this.classList.contains('rc-notification-notice')) {
+          return this.textContent === 'second' ? 18 : 10;
+        }
+
+        return 0;
+      });
+    const offsetWidthSpy = vi
+      .spyOn(HTMLElement.prototype, 'offsetWidth', 'get')
+      .mockImplementation(function offsetWidth(this: HTMLElement) {
+        if (this.classList.contains('rc-notification-notice')) {
+          return this.textContent === 'second' ? 28 : 20;
+        }
+
+        return 0;
+      });
+
+    const { instance } = renderDemo();
+
+    act(() => {
+      instance.open({
+        description: 'first',
+        duration: false,
+      });
+      instance.open({
+        description: 'second',
+        duration: false,
+      });
+    });
+
+    expect(document.querySelector('.rc-notification-list-content')).toHaveStyle({
+      '--top-notificiation-height': '18px',
+      '--top-notificiation-width': '28px',
+    });
+
+    offsetHeightSpy.mockRestore();
+    offsetWidthSpy.mockRestore();
+  });
+
   it('placement', () => {
     const { instance } = renderDemo();