diff --git a/src/Support/OperationExtensions/RulesExtractor/RulesMapper.php b/src/Support/OperationExtensions/RulesExtractor/RulesMapper.php
index ac799793..acbaa386 100644
--- a/src/Support/OperationExtensions/RulesExtractor/RulesMapper.php
+++ b/src/Support/OperationExtensions/RulesExtractor/RulesMapper.php
@@ -139,6 +139,13 @@ public function max(Type $type, $params)
         return $type;
     }
 
+    public function size(Type $type, $params)
+    {
+        $type = $this->min($type, $params);
+
+        return $this->max($type, $params);
+    }
+
     public function in(Type $type, $params)
     {
         return $type->enum(