diff --git a/index.js b/index.js
index b514fc1..046ced6 100644
--- a/index.js
+++ b/index.js
@@ -66,6 +66,8 @@
     this.forceGemini = false;
     this.onResize = null;
     this.minThumbSize = 20;
+    this.offsetX = 0;
+    this.offsetY = 0;
 
     Object.keys(config || {}).forEach(function (propertyName) {
       this[propertyName] = config[propertyName];
@@ -213,8 +215,8 @@
       return this;
     }
 
-    this._viewElement.style.width = ((this.element.offsetWidth + SCROLLBAR_WIDTH).toString() + 'px');
-    this._viewElement.style.height = ((this.element.offsetHeight + SCROLLBAR_WIDTH).toString() + 'px');
+    this._viewElement.style.width = ((this.element.offsetWidth + SCROLLBAR_WIDTH - this.offsetX).toString() + 'px');
+    this._viewElement.style.height = ((this.element.offsetHeight + SCROLLBAR_WIDTH - this.offsetY).toString() + 'px');
 
     this._naturalThumbSizeX = this._scrollbarHorizontalElement.clientWidth / this._viewElement.scrollWidth * this._scrollbarHorizontalElement.clientWidth;
     this._naturalThumbSizeY = this._scrollbarVerticalElement.clientHeight / this._viewElement.scrollHeight * this._scrollbarVerticalElement.clientHeight;