diff --git a/config_spec.yml b/config_spec.yml
index 9d96b1f48f..d013c806ac 100644
--- a/config_spec.yml
+++ b/config_spec.yml
@@ -151,7 +151,7 @@ display:
     fullscreen_exclusive: bool
     startup_size:
       type: enum
-      values: [last_used, 640x480, 1280x720, 1280x800, 1280x960, 1920x1080, 2560x1440, 2560x1600, 2560x1920, 3840x2160]
+      values: [last_used, 640x480, 720x480, 1280x720, 1280x800, 1280x960, 1920x1080, 2560x1440, 2560x1600, 2560x1920, 3840x2160]
       default: 1280x960
     last_width:
       type: integer
diff --git a/ui/xemu.c b/ui/xemu.c
index 645081d7e8..b602d25c09 100644
--- a/ui/xemu.c
+++ b/ui/xemu.c
@@ -731,6 +731,7 @@ static void sdl2_display_very_early_init(DisplayOptions *o)
 
     const int res_table[][2] = {
         {640,  480},
+        {720,  480},
         {1280, 720},
         {1280, 800},
         {1280, 960},
diff --git a/ui/xui/main-menu.cc b/ui/xui/main-menu.cc
index d34c08b00e..d68138dceb 100644
--- a/ui/xui/main-menu.cc
+++ b/ui/xui/main-menu.cc
@@ -525,6 +525,7 @@ void MainMenuDisplayView::Draw()
     if (ChevronCombo("Window size", &g_config.display.window.startup_size,
                      "Last Used\0"
                      "640x480\0"
+                     "720x480\0"
                      "1280x720\0"
                      "1280x800\0"
                      "1280x960\0"