diff --git a/reflex/components/radix/themes/components/separator.py b/reflex/components/radix/themes/components/separator.py
index 1982fb435..a079e400a 100644
--- a/reflex/components/radix/themes/components/separator.py
+++ b/reflex/components/radix/themes/components/separator.py
@@ -18,7 +18,7 @@ class Separator(CommonMarginProps, RadixThemesComponent):
     tag = "Separator"
 
     # The size of the select: "1" | "2" | "3" | "4"
-    size: Var[LiteralSeperatorSize]
+    size: Var[LiteralSeperatorSize] = Var.create_safe("4")
 
     # The color of the select
     color: Var[LiteralAccentColor]