diff --git a/jquery.switchButton.css b/jquery.switchButton.css
index e1668dd..5c4a058 100755
--- a/jquery.switchButton.css
+++ b/jquery.switchButton.css
@@ -1,3 +1,32 @@
+/**
+ * jquery.switchButton.js v1.0
+ * jQuery iPhone-like switch button
+ * @author Olivier Lance <olivier.lance@sylights.com>
+ *
+ * Copyright (c) Olivier Lance - released under MIT License {{{
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ * }}}
+ */
+ 
+ 
 .switch-button-label {
     float: left;
 
diff --git a/jquery.switchButton.js b/jquery.switchButton.js
index 105aeb2..00d37a7 100755
--- a/jquery.switchButton.js
+++ b/jquery.switchButton.js
@@ -49,7 +49,8 @@
             on_label: "ON",				// Text to be displayed when checked
             off_label: "OFF",			// Text to be displayed when unchecked
 
-            width: 25,					// Width of the button in pixels
+            size_unit: "px",			// Size Unit for the Switch
+			width: 25,					// Width of the button in pixels
             height: 11,					// Height of the button in pixels
             button_width: 12,			// Width of the sliding part in pixels
 
@@ -183,10 +184,10 @@
             this.off_label.html(this.options.off_label);
 
             // Refresh button's dimensions
-            this.button_bg.width(this.options.width);
-            this.button_bg.height(this.options.height);
-            this.button.width(this.options.button_width);
-            this.button.height(this.options.height);
+            this.button_bg.width(this.options.width.concat(this.options.size_unit));
+            this.button_bg.height(this.options.height.concat(this.options.size_unit));
+            this.button.width(this.options.button_width.concat(this.options.size_unit));
+            this.button.height(this.options.height.concat(this.options.size_unit));
         },
 
         _initEvents: function() {
@@ -258,8 +259,8 @@
                 this.element.prop("checked", true);
                 this.element.change();
 
-                var dLeft = this.options.width - this.options.button_width;
-                newLeft = "+=" + dLeft;
+                var dLeft = this.options.width - this.options.button_width;                
+                newLeft = dLeft + this.options.size_unit;
 
                 // Update labels states
                 if(this.options.labels_placement == "both")