diff --git a/dev/Styles/User/MessageList.less b/dev/Styles/User/MessageList.less
index 0772e3ed7..e5ae5b3e8 100644
--- a/dev/Styles/User/MessageList.less
+++ b/dev/Styles/User/MessageList.less
@@ -20,8 +20,10 @@ html.rl-mobile, html.rl-no-preview-pane {
 	min-width: 320px;
 	overflow: auto;
 	resize: horizontal;
+	width: 35vw;
 }
 .rl-bottom-preview-pane #V-MailMessageList .messageList {
+	height: 35vh;
 	max-height: 50vh;
 	min-height: 200px;
 	overflow: auto;