diff --git a/webroot/rsrc/image/custom/README b/webroot/rsrc/image/custom/README
index bab43c10c9..dbe339a3b7 100644
--- a/webroot/rsrc/image/custom/README
+++ b/webroot/rsrc/image/custom/README
@@ -1,3 +1,3 @@
-To customize your Phabricator install's appearance, create a 240x80 PNG like
+To customize your Phabricator install's appearance, create a 220x80 PNG like
 the examples in this folder, name it "custom.png" in this folder, and then set
 'phabricator.custom.logo' to a link URI.