diff --git a/src/less/base/single/button/switch.less b/src/less/base/single/button/switch.less
index 9fbab0e73..22ba538c9 100644
--- a/src/less/base/single/button/switch.less
+++ b/src/less/base/single/button/switch.less
@@ -1,6 +1,7 @@
 @import "../../../index";
 
-.bi-switch{
+.bi-switch {
+  font-size: @font-size-12;
   .border-radius(40px 40px 40px 40px);
   background-color: @color-bi-background-switch;
   .transition(all .2s);