diff --git a/components/input-number/demo/disabled.md b/components/input-number/demo/disabled.md
index abcdfcfe13..23c8cc723b 100644
--- a/components/input-number/demo/disabled.md
+++ b/components/input-number/demo/disabled.md
@@ -1,6 +1,6 @@
 # 不可用
 
-- order: 0
+- order: 2
 
 点击按钮切换可用状态。
 
diff --git a/components/input-number/demo/size.md b/components/input-number/demo/size.md
new file mode 100644
index 0000000000..34814e6cd2
--- /dev/null
+++ b/components/input-number/demo/size.md
@@ -0,0 +1,29 @@
+# 三种大小
+
+- order: 1
+
+三种大小的数字输入框，当 className 分别为 `ant-input-number-lg` 和 `ant-input-number-sm` 时，输入框高度为 `32px` 和 `22px` ，默认高度为 `28px`
+
+---
+
+````jsx
+var InputNumber = antd.InputNumber;
+
+function onChange(value) {
+  console.log('changed', value);
+}
+
+React.render(
+<div>
+  <InputNumber className="ant-input-number-lg" min={1} max={100000} defaultValue={3} onChange={onChange} />
+  <InputNumber min={1} max={100000} defaultValue={3} onChange={onChange} />
+  <InputNumber className="ant-input-number-sm" min={1} max={100000} defaultValue={3} onChange={onChange} />
+</div>
+, document.getElementById('components-input-number-demo-size'));
+````
+
+````css
+.ant-input-number{
+  margin-right: 10px;
+}
+````
\ No newline at end of file
diff --git a/components/input-number/index.md b/components/input-number/index.md
index ad2603628c..00222a9136 100644
--- a/components/input-number/index.md
+++ b/components/input-number/index.md
@@ -25,3 +25,4 @@
 | defaultValue     | 初始值       | Number      |            |
 | onChange     | 变化回调       | Function      |            |
 | disabled     | 禁用       | Boolean      |      false      |
+| className    | 输入框大小  | String      |      无      |
diff --git a/style/components/inputNumber.less b/style/components/inputNumber.less
index f03bcf1627..c407cb7799 100644
--- a/style/components/inputNumber.less
+++ b/style/components/inputNumber.less
@@ -75,6 +75,60 @@
       .disabled();
     }
   }
+  
+  &-lg{
+    padding: 0!important;
+    .ant-input-number-handler-wrap{
+      height: 32px;
+    }
+    .ant-input-number-input-wrap{
+      height: 32px;
+    }
+    .ant-input-number-handler{
+      height: 16px;
+    }
+
+    input{
+      height: 32px;
+      line-height: 32px;
+      font-size: 14px;
+    }
+
+    .ant-input-number-handler-up-inner{
+      top: 2px;
+    }
+    .ant-input-number-handler-down-inner{
+      top: 18px;
+    }
+  }
+
+  &-sm{
+    padding: 0!important;
+    .ant-input-number-handler-wrap{
+      height: 22px;
+    }
+    .ant-input-number-input-wrap{
+      height: 22px;
+      overflow: hidden;
+      position: relative;
+    }
+    .ant-input-number-handler{
+      height: 11px;
+    }
+
+    input{
+      height: 22px;
+      line-height: 22px;
+      position: absolute;
+      top: 0;
+    }
+    .ant-input-number-handler-up-inner{
+      top: -1px;
+    }
+    .ant-input-number-handler-down-inner{
+      top: 10px;
+    }
+  }
 
   &-handler-wrap {
     float: right;