diff --git a/inc/basic_widgets/core/type/size.hpp b/inc/basic_widgets/core/type/size.hpp
index fed68c4..ad1260b 100644
--- a/inc/basic_widgets/core/type/size.hpp
+++ b/inc/basic_widgets/core/type/size.hpp
@@ -9,26 +9,29 @@ namespace bwidgets
     {
         int w;
         int h;
-
-        [[nodiscard]] inline auto operator-() const noexcept -> Size
-        {
-            return {-w, -h};
-        }
-        [[nodiscard]] inline auto operator+(const Size& s) const noexcept -> Size
-        {
-            return {w + s.w, h + s.h};
-        }
-        [[nodiscard]] inline auto operator-(const Size& s) const noexcept -> Size
-        {
-            return {w - s.w, h - s.h};
-        }
-
-        template<Numeric N>
-        [[nodiscard]] inline auto operator*(N a) const noexcept -> Size
-        {
-            return {a * w, a * h};
-        }
     };
+
+    [[nodiscard]] inline auto operator+(Size a, Size b) noexcept -> Size
+    {
+        return {a.w + b.w, a.h + b.h};
+    }
+
+    [[nodiscard]] inline auto operator-(Size a, Size b) noexcept -> Size
+    {
+        return {a.w - b.w, a.h - b.h};
+    }
+
+    template<Numeric N>
+    [[nodiscard]] inline auto operator*(Size a, N b) noexcept -> Size
+    {
+        return {a.w * b, a.h * b};
+    }
+
+    template<Numeric N>
+    [[nodiscard]] inline auto operator*(N a, Size b) noexcept -> Size
+    {
+        return b * a;
+    }
 }
 
 #endif