diff --git a/djangoapps/simplewiki/mdx_circuit.py b/djangoapps/simplewiki/mdx_circuit.py
index 2bef237c6a..1f47dd0568 100755
--- a/djangoapps/simplewiki/mdx_circuit.py
+++ b/djangoapps/simplewiki/mdx_circuit.py
@@ -65,7 +65,7 @@ class CircuitLink(markdown.inlinepatterns.Pattern):
     def handleMatch(self, m):
         data = m.group('data')
         data = escape(data)
-        return etree.fromstring("<div align='center'><input type='hidden' parts='' value='" + data + "' analyses='' class='schematic ctrls' width='500' height='300'/></div>")
+        return etree.fromstring("<div align='center'><input type='hidden' parts='' value='" + data + "' analyses='' class='schematic ctrls' width='640' height='480'/></div>")
         
     
 def makeExtension(configs=None) :
diff --git a/static/js/CodeMirror/mitx_markdown.js b/static/js/CodeMirror/mitx_markdown.js
index a6f5ed14c6..eba6f0a49f 100644
--- a/static/js/CodeMirror/mitx_markdown.js
+++ b/static/js/CodeMirror/mitx_markdown.js
@@ -1,5 +1,5 @@
-var schematic_height = 300;
-var schematic_width = 500;
+var schematic_height = 480;
+var schematic_width = 640;
 
 $(function(){
   $(document).ready(function() {