diff --git a/cartridges/__init__.py b/cartridges/__init__.py
index 5dbe7e0..9708cb2 100644
--- a/cartridges/__init__.py
+++ b/cartridges/__init__.py
@@ -17,9 +17,10 @@ gi.require_versions({
 
 from gi.repository import Gio, GLib
 
-from .config import LOCALEDIR, PKGDATADIR
+from .config import APP_ID, LOCALEDIR, PKGDATADIR
 
 DATA_DIR = Path(GLib.get_user_data_dir(), "cartridges")
+state_settings = Gio.Settings.new(f"{APP_ID}.State")
 
 _RESOURCES = ("data", "icons", "ui")
 
diff --git a/cartridges/ui/window.blp b/cartridges/ui/window.blp
index e652aa9..7fb7369 100644
--- a/cartridges/ui/window.blp
+++ b/cartridges/ui/window.blp
@@ -4,8 +4,6 @@ using Adw 1;
 
 template $Window: Adw.ApplicationWindow {
   title: _("Cartridges");
-  default-width: 920;
-  default-height: 700;
 
   ShortcutController {
     Shortcut {
diff --git a/cartridges/ui/window.py b/cartridges/ui/window.py
index 9f97281..c10af5b 100644
--- a/cartridges/ui/window.py
+++ b/cartridges/ui/window.py
@@ -10,7 +10,7 @@ from typing import Any
 
 from gi.repository import Adw, Gdk, Gio, GLib, GObject, Gtk
 
-from cartridges import games
+from cartridges import games, state_settings
 from cartridges.config import PREFIX, PROFILE
 from cartridges.games import Game
 
@@ -54,6 +54,13 @@ class Window(Adw.ApplicationWindow):
         if PROFILE == "development":
             self.add_css_class("devel")
 
+        for key, name in {
+            "width": "default-width",
+            "height": "default-height",
+            "is-maximized": "maximized",
+        }.items():
+            state_settings.bind(key, self, name, Gio.SettingsBindFlags.DEFAULT)
+
         # https://gitlab.gnome.org/GNOME/gtk/-/issues/7901
         self.search_entry.set_key_capture_widget(self)
         self.sorter.set_sort_func(self._sort_func)
diff --git a/data/page.kramo.Cartridges.gschema.xml.in b/data/page.kramo.Cartridges.gschema.xml.in
index 4e1bf5d..994a571 100644
--- a/data/page.kramo.Cartridges.gschema.xml.in
+++ b/data/page.kramo.Cartridges.gschema.xml.in
@@ -2,4 +2,15 @@
 <schemalist gettext-domain="cartridges">
   <schema id="@APP_ID@" path="@PREFIX@/">
   </schema>
+  <schema id="@APP_ID@.State" path="@PREFIX@/State/">
+    <key name="width" type="i">
+      <default>920</default>
+    </key>
+    <key name="height" type="i">
+      <default>700</default>
+    </key>
+    <key name="is-maximized" type="b">
+      <default>false</default>
+    </key>
+  </schema>
 </schemalist>