diff --git a/vmware_nsx/extensions/routersize.py b/vmware_nsx/extensions/routersize.py
index 6ede0e0f17..2a3be102ea 100644
--- a/vmware_nsx/extensions/routersize.py
+++ b/vmware_nsx/extensions/routersize.py
@@ -20,7 +20,7 @@ ROUTER_SIZE = 'router_size'
 VALID_EDGE_SIZES = ['compact', 'large', 'xlarge', 'quadlarge']
 EXTENDED_ATTRIBUTES_2_0 = {
     'routers': {
-        ROUTER_SIZE: {'allow_post': True, 'allow_put': False,
+        ROUTER_SIZE: {'allow_post': True, 'allow_put': True,
                       'validate': {'type:values': VALID_EDGE_SIZES},
                       'default': constants.ATTR_NOT_SPECIFIED,
                       'is_visible': True},
diff --git a/vmware_nsx/plugins/nsx_v/drivers/exclusive_router_driver.py b/vmware_nsx/plugins/nsx_v/drivers/exclusive_router_driver.py
index 40a834d10e..fccf4c8cc0 100644
--- a/vmware_nsx/plugins/nsx_v/drivers/exclusive_router_driver.py
+++ b/vmware_nsx/plugins/nsx_v/drivers/exclusive_router_driver.py
@@ -67,6 +67,16 @@ class RouterExclusiveDriver(router_driver.RouterBaseDriver):
                 context, router_id, self.get_type(), r['admin_state_up'])
         if 'name' in r:
             self.edge_manager.rename_lrouter(context, router_id, r['name'])
+        if r.get('router_size'):
+            edge_id = edge_utils.get_router_edge_id(context, router_id)
+            with locking.LockManager.get_lock(edge_id):
+                edge_cfg = self.vcns.get_edge(edge_id)[1]
+                if edge_cfg.get('appliances'):
+                    edge_cfg['appliances']['applianceSize'] = r['router_size']
+                    self.vcns.update_edge(edge_id, edge_cfg, async=False)
+                    nsxv_db.update_nsxv_router_binding(
+                        context.session, router_id,
+                        appliance_size=r['router_size'])
         return self.plugin.get_router(context, router_id)
 
     def detach_router(self, context, router_id, router):