diff --git a/src/select-input/interface.d.ts b/src/select-input/interface.d.ts
index f49f8dcf2..48b68b01c 100644
--- a/src/select-input/interface.d.ts
+++ b/src/select-input/interface.d.ts
@@ -10,6 +10,7 @@ export interface SelectInputCommonProperties {
   readonly?: TdSelectInputProps['readonly'];
   suffix?: TdSelectInputProps['suffix'];
   suffixIcon?: TdSelectInputProps['suffixIcon'];
+  size?: TdSelectInputProps['size'];
   onPaste?: TdSelectInputProps['onPaste'];
   onEnter?: TdSelectInputProps['onEnter'];
   onMouseenter?: TdSelectInputProps['onMouseenter'];