diff --git a/tuhi/base.py b/tuhi/base.py
index cbaa940..b594281 100644
--- a/tuhi/base.py
+++ b/tuhi/base.py
@@ -79,6 +79,12 @@ class TuhiDevice(GObject.Object):
 
         self._tuhi_dbus_device = None
 
+    @GObject.Property
+    def dimensions(self):
+        if self._wacom_device is None:
+            return 0, 0
+        return self._wacom_device.dimensions
+
     @GObject.Property
     def mode(self):
         return self._mode
@@ -174,6 +180,7 @@ class TuhiDevice(GObject.Object):
             self._wacom_device.connect('notify::uuid', self._on_uuid_updated, bluez_device)
             self._wacom_device.connect('battery-status', self._on_battery_status, bluez_device)
             self._wacom_device.connect('notify::sync-state', self._on_sync_state)
+            self._wacom_device.connect('notify::dimensions', self._on_dimensions)
 
         if mode == DeviceMode.REGISTER:
             self._wacom_device.start_register()
@@ -188,6 +195,9 @@ class TuhiDevice(GObject.Object):
         except KeyError:
             pass
 
+    def _on_dimensions(self, device, pspec):
+        self.notify('dimensions')
+
     def _on_sync_state(self, device, pspec):
         self._sync_state = device.sync_state
         self.notify('sync-state')
diff --git a/tuhi/dbusserver.py b/tuhi/dbusserver.py
index ccc399c..591b2f9 100755
--- a/tuhi/dbusserver.py
+++ b/tuhi/dbusserver.py
@@ -171,7 +171,7 @@ class TuhiDBusDevice(_TuhiDBus):
 
         self.bluez_device_objpath = device.bluez_device.objpath
         self.name = device.name
-        self.width, self.height = 0, 0
+        self.width, self.height = device.dimensions
         self.drawings = {}
         self.registered = device.registered
         self._listening = False
@@ -187,6 +187,7 @@ class TuhiDBusDevice(_TuhiDBus):
         device.connect('notify::battery-state', self._on_battery_state)
         device.connect('device-error', self._on_device_error)
         device.connect('notify::sync-state', self._on_sync_state)
+        device.connect('notify::dimensions', self._on_dimensions)
 
     @GObject.Property
     def listening(self):
@@ -335,6 +336,12 @@ class TuhiDBusDevice(_TuhiDBus):
             self._stop_listening(self.connection, self._listening_client[0],
                                  -exception.errno)
 
+    def _on_dimensions(self, device, pspec):
+        self.width, self.height = device.dimensions
+        w = GLib.Variant.new_uint32(self.width)
+        h = GLib.Variant.new_uint32(self.height)
+        self.properties_changed({'Dimensions': GLib.Variant.new_tuple(w, h)})
+
     def _on_sync_state(self, device, pspec):
         if self._listening_client is None:
             return
diff --git a/tuhi/wacom.py b/tuhi/wacom.py
index f076530..9445f3c 100644
--- a/tuhi/wacom.py
+++ b/tuhi/wacom.py
@@ -655,6 +655,10 @@ class WacomProtocolBase(WacomProtocolLowLevelComm):
 
             child = cls
 
+    @GObject.property
+    def dimensions(self):
+        return (self.width, self.height)
+
     def _on_pen_data_changed(self, name, value):
         logger.debug(binascii.hexlify(bytes(value)))
 
@@ -1050,6 +1054,7 @@ class WacomProtocolSlate(WacomProtocolSpark):
         # starting live mode
         self.width = self.get_dimensions('width')
         self.height = self.get_dimensions('height')
+        self.notify('dimensions')
         self.x_max = self.width - 1000
         self.y_max = self.height - 500
 
@@ -1082,11 +1087,14 @@ class WacomProtocolSlate(WacomProtocolSpark):
         self.ec_command()
         name = self.get_name()
         logger.info(f'device name is {name}')
+
         w = self.get_dimensions('width')
         h = self.get_dimensions('height')
         logger.debug(f'dimensions: {w}x{h}')
         if self.width != w or self.height != h:
             logger.error(f'incompatible dimensions: {w}x{h}')
+        self.notify('dimensions')
+
         fw_high = self.get_firmware_version(0)
         fw_low = self.get_firmware_version(1)
         logger.info(f'firmware is {fw_high}-{fw_low}')
@@ -1109,6 +1117,7 @@ class WacomProtocolSlate(WacomProtocolSpark):
             self.emit('battery-status', battery, charging)
             self.width = w = self.get_dimensions('width')
             self.height = h = self.get_dimensions('height')
+            self.notify('dimensions')
             logger.debug(f'dimensions: {w}x{h}')
 
             fw_high = self.get_firmware_version(0)
@@ -1311,6 +1320,14 @@ class WacomDevice(GObject.Object):
             'battery-status',
             lambda prot, percent, is_charging, self: self.emit('battery-status', percent, is_charging),
             self)
+        self._wacom_protocol.connect('notify::dimensions', self._on_dimensions)
+
+    @GObject.Property
+    def dimensions(self):
+        return self._wacom_protocol.dimensions
+
+    def _on_dimensions(self, protocol, pspec):
+        self.notify('dimensions')
 
     @GObject.Property
     def uuid(self):