diff --git a/addon/chrome/content/styles/outline.css b/addon/chrome/content/styles/outline.css
index 4598945..8e0b09a 100644
--- a/addon/chrome/content/styles/outline.css
+++ b/addon/chrome/content/styles/outline.css
@@ -26,10 +26,15 @@ bn-outline .zotero-tb-button {
   width: 28px;
   height: 28px;
   margin: 0px 4px 0px 4px;
+  padding: 0px 4px 0px 4px;
   fill: currentColor;
   -moz-context-properties: fill, fill-opacity;
 }
 
+bn-outline .zotero-tb-button[type=menu] {
+    width: 40px;
+}
+
 #__addonRef__-setOutline {
   list-style-image: url("chrome://__addonRef__/content/icons/outline-20.svg");
 }