diff --git a/web_extras/extra.css b/web_extras/extra.css
index b817b92..7418de3 100644
--- a/web_extras/extra.css
+++ b/web_extras/extra.css
@@ -285,12 +285,18 @@ h1 + ol, h2 + ol, h3 + ol, h4 + ol{
     padding: .75em 1.25em;
 }
 
-/* Let table images respect their explicit dimensions */
-.md-typeset table img {
+/* Vertical align table cells so icons sit in the middle */
+.md-typeset table td,
+.md-typeset table th {
+    vertical-align: middle;
+}
+
+/* Keep pattern icons fixed at 45px inside tables */
+.md-typeset table img[alt^="param_"] {
     max-width: none;
     max-height: none;
     width: auto;
-    height: unset !important;
+    height: 45px !important;
 }
 
 /* /////// FOOTER */