diff --git a/packages/stepper/README.md b/packages/stepper/README.md
index 9056d067..0beb6db9 100644
--- a/packages/stepper/README.md
+++ b/packages/stepper/README.md
@@ -23,7 +23,9 @@ Page({
       // 最小可到的数字
       min: 1,
       // 最大可到的数字
-      max: 1
+      max: 1,
+      // 小尺寸, 默认大尺寸
+      size: 'small'
     }
   },