--- blocks.css (saved version)
+++ (current document)
@@ -66,6 +66,11 @@
   border-bottom: 1px solid #BBB;
 }
 
+.region-sidebar-first .block h2.title /* Block title - first sidebar */
+{
+  font-size: 1.2em;
+}
+
 .block .content /* Block's content wrapper */
 {
 	font-size: .8em;