diff --git a/src/components/ResizeHandler.tsx b/src/components/ResizeHandler.tsx
index 2675a11..177de70 100644
--- a/src/components/ResizeHandler.tsx
+++ b/src/components/ResizeHandler.tsx
@@ -5,13 +5,20 @@ import { Size } from './SideBarBodyWrapper'
 type Props = {
   size: Size
   onResize(size: Size): void
+  onResetSize?(): void
   onResizeStateChange?(state: ResizeState): void
   style?: React.CSSProperties
 }
 
 type ResizeState = 'idle' | 'resizing'
 
-export function HorizontalResizeHandler({ onResize, onResizeStateChange, size, style }: Props) {
+export function HorizontalResizeHandler({
+  onResize,
+  onResetSize,
+  onResizeStateChange,
+  size,
+  style,
+}: Props) {
   const pointerDown = React.useRef(false)
   const startX = React.useRef(0)
   const baseSize = React.useRef(size)
@@ -51,7 +58,12 @@ export function HorizontalResizeHandler({ onResize, onResizeStateChange, size, s
   }, [])
 
   return (
-    <div className={'gitako-resize-handler'} onMouseDown={onPointerDown} style={style}>
+    <div
+      className={'gitako-resize-handler'}
+      onMouseDown={onPointerDown}
+      onDoubleClick={onResetSize}
+      style={style}
+    >
       <Icon type={'grabber'} className={'grabber-icon'} size={20} />
     </div>
   )
diff --git a/src/components/SideBarBodyWrapper.tsx b/src/components/SideBarBodyWrapper.tsx
index b18599e..d0b1c10 100644
--- a/src/components/SideBarBodyWrapper.tsx
+++ b/src/components/SideBarBodyWrapper.tsx
@@ -2,6 +2,7 @@ import { HorizontalResizeHandler } from 'components/ResizeHandler'
 import { useConfigs } from 'containers/ConfigsContext'
 import * as React from 'react'
 import { useDebounce, useWindowSize } from 'react-use'
+import { defaultConfigs } from 'utils/config/helper'
 import { cx } from 'utils/cx'
 import { setResizingState } from 'utils/DOMHelper'
 import * as features from 'utils/features'
@@ -69,6 +70,7 @@ export function SideBarBodyWrapper({
       {features.resize && (
         <HorizontalResizeHandler
           onResize={onResize}
+          onResetSize={() => setSize(defaultConfigs.sideBarWidth)}
           onResizeStateChange={state => {
             blockLeaveRef.current = state === 'resizing'
           }}
diff --git a/src/utils/config/helper.ts b/src/utils/config/helper.ts
index 16b71fd..9680976 100644
--- a/src/utils/config/helper.ts
+++ b/src/utils/config/helper.ts
@@ -35,7 +35,7 @@ enum configKeys {
   sidebarToggleMode = 'sidebarToggleMode',
 }
 
-const defaultConfigs: Config = {
+export const defaultConfigs: Config = {
   sideBarWidth: 260,
   shortcut: undefined,
   accessToken: '',