diff --git a/packages/theme/src/grid/checkbox.less b/packages/theme/src/grid/checkbox.less
index 917dc14f9d..e9c2dd3107 100644
--- a/packages/theme/src/grid/checkbox.less
+++ b/packages/theme/src/grid/checkbox.less
@@ -30,8 +30,8 @@
     & + .@{grid-checkbox-prefix-cls}__icon {
       position: relative;
       display: block;
-      width: 1em;
-      height: 1em;
+      width: var(--tv-Grid-icon-size);
+      height: var(--tv-Grid-icon-size);
       border-radius: var(--tv-Grid-checkbox-border-radius);
       font-size: var(--tv-Grid-font-size);