diff --git a/Utilities/Config.cpp b/Utilities/Config.cpp
index 381ee01079..bd0fe7a8b8 100644
--- a/Utilities/Config.cpp
+++ b/Utilities/Config.cpp
@@ -362,6 +362,27 @@ std::vector<std::string> cfg::try_to_enum_list(decltype(&fmt_class_string<int>::
 	return result;
 }
 
+size_t cfg::try_to_enum_size(decltype(&fmt_class_string<int>::format) func)
+{
+	size_t result = 0;
+	for (u64 i = 0;; i++)
+	{
+		std::string var;
+		func(var, i);
+
+		std::string hex;
+		fmt_class_string<u64>::format(hex, i);
+		if (var == hex)
+		{
+			break;
+		}
+
+		result++;
+	}
+
+	return result;
+}
+
 void cfg::encode(YAML::Emitter& out, const cfg::_base& rhs)
 {
 	switch (rhs.get_type())
diff --git a/Utilities/Config.h b/Utilities/Config.h
index 35dcddc1a6..ca9af028a5 100644
--- a/Utilities/Config.h
+++ b/Utilities/Config.h
@@ -30,6 +30,9 @@ namespace cfg
 	// Internal hack
 	std::vector<std::string> try_to_enum_list(decltype(&fmt_class_string<int>::format) func);
 
+	// Internal hack
+	size_t try_to_enum_size(decltype(&fmt_class_string<int>::format) func);
+
 	// Config tree entry type.
 	enum class type : unsigned
 	{
@@ -312,6 +315,11 @@ namespace cfg
 		{
 			return try_to_enum_list(&fmt_class_string<T>::format);
 		}
+
+		size_t size() const
+		{
+			return try_to_enum_size(&fmt_class_string<T>::format);
+		}
 	};
 
 	// Signed 32/64-bit integer entry with custom Min/Max range.