diff --git a/dist/image-editor.js b/dist/image-editor.js
index c447bda..65778f0 100644
--- a/dist/image-editor.js
+++ b/dist/image-editor.js
@@ -1047,7 +1047,7 @@ function FrameHandler(viewport) {
     });
 
     var vpData = viewport.getData();
-    var realFrameSize = 30; // Actual real life frame size width in mm.
+    var realFrameSize = 20; // Actual real life frame size width in mm.
 
 
     _frameSize = vpData.ppmm * realFrameSize * viewport.canvas.getImage().scaleX;
diff --git a/src/FrameHandler.js b/src/FrameHandler.js
index b1685f5..8fcf461 100644
--- a/src/FrameHandler.js
+++ b/src/FrameHandler.js
@@ -89,7 +89,7 @@ function FrameHandler(viewport) {
     });
 
     var vpData = viewport.getData();
-    var realFrameSize = 30; // Actual real life frame size width in mm.
+    var realFrameSize = 20; // Actual real life frame size width in mm.
 
 
     _frameSize = vpData.ppmm * realFrameSize * viewport.canvas.getImage().scaleX;