diff --git a/frontend/src/app/plugins/flex.cljs b/frontend/src/app/plugins/flex.cljs
index 8f52299bd7..4c55edec3b 100644
--- a/frontend/src/app/plugins/flex.cljs
+++ b/frontend/src/app/plugins/flex.cljs
@@ -261,7 +261,39 @@
         :else
         (let [child-id  (obj/get child "$id")]
           (st/emit! (dwt/move-shapes-to-frame #{child-id} id nil nil)
-                    (ptk/data-event :layout/update {:ids [id]})))))))
+                    (ptk/data-event :layout/update {:ids [id]})))))
+
+    :horizontalSizing
+    {:this true
+     :get #(-> % u/proxy->shape :layout-item-h-sizing (d/nilv :fix) d/name)
+     :set
+     (fn [_ value]
+       (let [value (keyword value)]
+         (cond
+           (not (contains? ctl/item-h-sizing-types value))
+           (u/display-not-valid :horizontalPadding value)
+
+           (not (r/check-permission plugin-id "content:write"))
+           (u/display-not-valid :horizontalPadding "Plugin doesn't have 'content:write' permission")
+
+           :else
+           (st/emit! (dwsl/update-layout-child #{id} {:layout-item-h-sizing value})))))}
+
+    :verticalSizing
+    {:this true
+     :get #(-> % u/proxy->shape :layout-item-v-sizing (d/nilv :fix) d/name)
+     :set
+     (fn [_ value]
+       (let [value (keyword value)]
+         (cond
+           (not (contains? ctl/item-v-sizing-types value))
+           (u/display-not-valid :verticalSizing value)
+
+           (not (r/check-permission plugin-id "content:write"))
+           (u/display-not-valid :verticalSizing "Plugin doesn't have 'content:write' permission")
+
+           :else
+           (st/emit! (dwsl/update-layout-child #{id} {:layout-item-v-sizing value})))))}))
 
 
 (defn layout-child-proxy? [p]