diff --git a/build/DAT.GUI.js b/build/DAT.GUI.js
index d1578b6..1b6e2bc 100644
--- a/build/DAT.GUI.js
+++ b/build/DAT.GUI.js
@@ -42,7 +42,11 @@ DAT.GUI = function(parameters) {
   var _this = this;
 
   var open = true;
+  
   var width = 280;
+  if (parameters.width != undefined) {
+  	width = parameters.width;
+  }
 
   // Prevents checkForOverflow bug in which loaded gui appearance
   // settings are not respected by presence of scrollbar.
diff --git a/build/DAT.GUI.min.js b/build/DAT.GUI.min.js
index 91630c7..6e57f48 100644
--- a/build/DAT.GUI.min.js
+++ b/build/DAT.GUI.min.js
@@ -11,10 +11,10 @@
  * http://www.apache.org/licenses/LICENSE-2.0
  */
 var DAT=DAT||{};
-DAT.GUI=function(a){a==void 0&&(a={});var b=!1;a.height==void 0?a.height=300:b=!0;var d=[],c=[],i=!0,f,h,j=this,g=!0,e=280,q=!1,k,p,n=0,r;this.domElement=document.createElement("div");this.domElement.setAttribute("class","guidat");this.domElement.style.width=e+"px";var l=a.height,m=document.createElement("div");m.setAttribute("class","guidat-controllers");m.style.height=l+"px";m.addEventListener("DOMMouseScroll",function(a){var b=this.scrollTop;a.wheelDelta?b+=a.wheelDelta:a.detail&&(b+=a.detail);
-a.preventDefault&&a.preventDefault();a.returnValue=!1;m.scrollTop=b},!1);var o=document.createElement("a");o.setAttribute("class","guidat-toggle");o.setAttribute("href","#");o.innerHTML=g?"Close Controls":"Open Controls";var t=!1,C=0,x=0,u=!1,v,y,w,z,D=function(a){y=v;z=w;v=a.pageY;w=a.pageX;a=v-y;if(!g)if(a>0)g=!0,l=k=1,o.innerHTML=p||"Close Controls";else return;var b=z-w;if(a>0&&l>h){var d=DAT.GUI.map(l,h,h+100,1,0);a*=d}t=!0;C+=a;k+=a;l+=a;m.style.height=k+"px";x+=b;e+=b;e=DAT.GUI.constrain(e,
-240,500);j.domElement.style.width=e+"px";A()};o.addEventListener("mousedown",function(a){y=v=a.pageY;z=w=a.pageX;u=!0;a.preventDefault();C=x=0;document.addEventListener("mousemove",D,!1);return!1},!1);o.addEventListener("click",function(a){a.preventDefault();return!1},!1);document.addEventListener("mouseup",function(a){u&&!t&&j.toggle();if(u&&t)if(x==0&&B(),k>h)clearTimeout(r),k=n=h,s();else if(m.children.length>=1){var b=m.children[0].offsetHeight;clearTimeout(r);n=Math.round(l/b)*b-1;n<=0?(j.close(),
-k=b*2):(k=n,s())}document.removeEventListener("mousemove",D,!1);a.preventDefault();return u=t=!1},!1);this.domElement.appendChild(m);this.domElement.appendChild(o);if(a.domElement)a.domElement.appendChild(this.domElement);else if(DAT.GUI.autoPlace){if(DAT.GUI.autoPlaceContainer==null)DAT.GUI.autoPlaceContainer=document.createElement("div"),DAT.GUI.autoPlaceContainer.setAttribute("id","guidat"),document.body.appendChild(DAT.GUI.autoPlaceContainer);DAT.GUI.autoPlaceContainer.appendChild(this.domElement)}this.autoListenIntervalTime=
+DAT.GUI=function(a){a==void 0&&(a={});var b=!1;a.height==void 0?a.height=300:b=!0;var d=[],c=[],i=!0,f,h,j=this,g=!0,e=280;if(a.width!=void 0)e=a.width;var q=!1,k,p,n=0,r;this.domElement=document.createElement("div");this.domElement.setAttribute("class","guidat");this.domElement.style.width=e+"px";var l=a.height,m=document.createElement("div");m.setAttribute("class","guidat-controllers");m.style.height=l+"px";m.addEventListener("DOMMouseScroll",function(a){var b=this.scrollTop;a.wheelDelta?b+=a.wheelDelta:
+a.detail&&(b+=a.detail);a.preventDefault&&a.preventDefault();a.returnValue=!1;m.scrollTop=b},!1);var o=document.createElement("a");o.setAttribute("class","guidat-toggle");o.setAttribute("href","#");o.innerHTML=g?"Close Controls":"Open Controls";var t=!1,C=0,x=0,u=!1,v,y,w,z,D=function(a){y=v;z=w;v=a.pageY;w=a.pageX;a=v-y;if(!g)if(a>0)g=!0,l=k=1,o.innerHTML=p||"Close Controls";else return;var b=z-w;if(a>0&&l>h){var d=DAT.GUI.map(l,h,h+100,1,0);a*=d}t=!0;C+=a;k+=a;l+=a;m.style.height=k+"px";x+=b;e+=
+b;e=DAT.GUI.constrain(e,240,500);j.domElement.style.width=e+"px";A()};o.addEventListener("mousedown",function(a){y=v=a.pageY;z=w=a.pageX;u=!0;a.preventDefault();C=x=0;document.addEventListener("mousemove",D,!1);return!1},!1);o.addEventListener("click",function(a){a.preventDefault();return!1},!1);document.addEventListener("mouseup",function(a){u&&!t&&j.toggle();if(u&&t)if(x==0&&B(),k>h)clearTimeout(r),k=n=h,s();else if(m.children.length>=1){var b=m.children[0].offsetHeight;clearTimeout(r);n=Math.round(l/
+b)*b-1;n<=0?(j.close(),k=b*2):(k=n,s())}document.removeEventListener("mousemove",D,!1);a.preventDefault();return u=t=!1},!1);this.domElement.appendChild(m);this.domElement.appendChild(o);if(a.domElement)a.domElement.appendChild(this.domElement);else if(DAT.GUI.autoPlace){if(DAT.GUI.autoPlaceContainer==null)DAT.GUI.autoPlaceContainer=document.createElement("div"),DAT.GUI.autoPlaceContainer.setAttribute("id","guidat"),document.body.appendChild(DAT.GUI.autoPlaceContainer);DAT.GUI.autoPlaceContainer.appendChild(this.domElement)}this.autoListenIntervalTime=
 1E3/60;var E=function(){f=setInterval(function(){j.listen()},this.autoListenIntervalTime)};this.__defineSetter__("autoListen",function(a){(i=a)?c.length>0&&E():clearInterval(f)});this.__defineGetter__("autoListen",function(){return i});this.listenTo=function(a){c.length==0&&E();c.push(a)};this.unlistenTo=function(a){for(var b=0;b<c.length;b++)c[b]==a&&c.splice(b,1);c.length<=0&&clearInterval(f)};this.listen=function(a){var a=a||c,b;for(b in a)a[b].updateDisplay()};this.listenAll=function(){this.listen(d)};
 this.autoListen=!0;var F=function(a,b){function d(){return a.apply(this,b)}d.prototype=a.prototype;return new d};this.add=function(){if(arguments.length==1){var a=[],c;for(c in arguments[0])a.push(j.add(arguments[0],c));return a}a=arguments[0];c=arguments[1];a:for(var e in d)if(d[e].object==a&&d[e].propertyName==c)break a;e=a[c];if(e==void 0)DAT.GUI.error(a+" either has no property '"+c+"', or the property is inaccessible.");else if(a=typeof e,e=G[a],e==void 0)DAT.GUI.error("Cannot create controller for data type '"+
 a+"'");else{for(var g=[this],f=0;f<arguments.length;f++)g.push(arguments[f]);if(e=F(e,g)){m.appendChild(e.domElement);d.push(e);DAT.GUI.allControllers.push(e);a!="function"&&DAT.GUI.saveIndex<DAT.GUI.savedValues.length&&(e.setValue(DAT.GUI.savedValues[DAT.GUI.saveIndex]),DAT.GUI.saveIndex++);A();q||(k=h);if(!b)try{if(arguments.callee.caller==window.onload)l=n=k=h,m.style.height=l+"px"}catch(i){}return e}else DAT.GUI.error("Error creating controller for '"+c+"'.")}};var A=function(){h=0;for(var a in d)h+=
diff --git a/index.html b/index.html
index bb10dc2..59b44c6 100644
--- a/index.html
+++ b/index.html
@@ -135,12 +135,12 @@
 <ul>
   <li>
   	<a href='https://github.com/dataarts/dat.gui/raw/master/build/DAT.GUI.min.js'><strong>Download the minified source</strong></a>
-    <small id='buildsizemin'>[19.3kb]
+    <small id='buildsizemin'>[19.4kb]
     </small>
   </li>
   <li>
   	<a href='https://github.com/dataarts/dat.gui/raw/master/build/DAT.GUI.js'><strong>Download the uncompressed source</strong></a>
-    <small id='buildsize'>[33.3kb]
+    <small id='buildsize'>[33.4kb]
     </small>
   </li>
 
diff --git a/src/DAT/GUI/GUI.js b/src/DAT/GUI/GUI.js
index 426e89a..98dac43 100644
--- a/src/DAT/GUI/GUI.js
+++ b/src/DAT/GUI/GUI.js
@@ -30,7 +30,11 @@ DAT.GUI = function(parameters) {
   var _this = this;
 
   var open = true;
+  
   var width = 280;
+  if (parameters.width != undefined) {
+  	width = parameters.width;
+  }
 
   // Prevents checkForOverflow bug in which loaded gui appearance
   // settings are not respected by presence of scrollbar.