diff --git a/src/mosaic.ts b/src/mosaic.ts
index 546513f..542c66e 100644
--- a/src/mosaic.ts
+++ b/src/mosaic.ts
@@ -133,24 +133,4 @@ const calcVerticalSize = (first: Size, second: Size): VerticalSize => {
     firstHeight: swapped ? smallHeight : big.height,
     secondHeight: swapped ? big.height : smallHeight
   } as VerticalSize;
-};
-
-interface Size {
-  width: number;
-  height: number;
-}
-
-interface HorizontalSize {
-  width: number;
-  height: number;
-  firstWidth: number;
-  secondWidth: number;
-}
-
-interface VerticalSize {
-  width: number;
-  height: number;
-  firstHeight: number;
-  secondHeight: number;
-}
-
+};
\ No newline at end of file
diff --git a/src/types.d.ts b/src/types.d.ts
index eda48e0..f53e36d 100644
--- a/src/types.d.ts
+++ b/src/types.d.ts
@@ -17,6 +17,25 @@ interface Request {
   };
 }
 
+interface Size {
+  width: number;
+  height: number;
+}
+
+interface HorizontalSize {
+  width: number;
+  height: number;
+  firstWidth: number;
+  secondWidth: number;
+}
+
+interface VerticalSize {
+  width: number;
+  height: number;
+  firstHeight: number;
+  secondHeight: number;
+}
+
 interface APIResponse {
   code: number;
   message: string;