diff --git a/lib/ui.js b/lib/ui.js
index <HASH>..<HASH> 100644
--- a/lib/ui.js
+++ b/lib/ui.js
@@ -154,8 +154,6 @@ var Preview = function (canvas, position_x, position_y, opts) {
         this.palette = opts.palette;
         this.render();
     }
-    this.width = (this.spriteSize + this.pixelPadding) * 2 - this.pixelPadding;
-    this.height = (this.spriteSize + this.pixelPadding) * 4 - this.pixelPadding;
 };
 
 Preview.prototype = new Widget();
removing duplicated lines on Preview widget