diff --git a/IPython/html/static/notebook/less/celltoolbar.less b/IPython/html/static/notebook/less/celltoolbar.less
index f957ce3..bb4ed98 100644
--- a/IPython/html/static/notebook/less/celltoolbar.less
+++ b/IPython/html/static/notebook/less/celltoolbar.less
@@ -38,6 +38,10 @@
     padding-top: 3px;
 }
 
+.celltoolbar select {
+    font-size: 87%;
+}
+
 .celltoolbar label {
     margin-left: 5px;
     margin-right: 5px;