diff --git a/src/stepper/index.less b/src/stepper/index.less
index a7c7f8594..381d1c96b 100644
--- a/src/stepper/index.less
+++ b/src/stepper/index.less
@@ -8,8 +8,8 @@
   &__plus {
     position: relative;
     box-sizing: border-box;
-    width: 28px;
-    height: 28px;
+    width: @stepper-input-height;
+    height: @stepper-input-height;
     margin: 0;
     padding: 5px;
     color: @stepper-button-icon-color;