diff --git a/CHANGELOG b/CHANGELOG
index a4355e60d2..f8a84a6c35 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,4 @@
+* Add width/height attribute to notebook
 * Allow to call set_lang with None and language instance
 * Add hostname configuration to list database
 * Add tree mixin
diff --git a/trytond/ir/ui/form.rnc b/trytond/ir/ui/form.rnc
index f50aa4b5f0..6849efcbf1 100644
--- a/trytond/ir/ui/form.rnc
+++ b/trytond/ir/ui/form.rnc
@@ -152,6 +152,8 @@ attlist.button &= attribute type { "class" | "instance" }?
 notebook = element notebook { attlist.notebook, page* }
 attlist.notebook &= [ a:defaultValue = "4" ] attribute colspan { text }?
 attlist.notebook &= attribute states { text }?
+attlist.notebook &= attribute width { text }?
+attlist.notebook &= attribute height { text }?
 page =
   element page {
     attlist.page,
diff --git a/trytond/ir/ui/form.rng b/trytond/ir/ui/form.rng
index d7d9cb3f07..dcd71485f3 100644
--- a/trytond/ir/ui/form.rng
+++ b/trytond/ir/ui/form.rng
@@ -616,6 +616,16 @@
       <attribute name="states"/>
     </optional>
   </define>
+  <define name="attlist.notebook" combine="interleave">
+    <optional>
+      <attribute name="width"/>
+    </optional>
+  </define>
+  <define name="attlist.notebook" combine="interleave">
+    <optional>
+      <attribute name="height"/>
+    </optional>
+  </define>
   <define name="page">
     <element name="page">
       <ref name="attlist.page"/>