diff --git a/src/calibre/gui2/convert/pdf_output.py b/src/calibre/gui2/convert/pdf_output.py
index 988564b6fc..e87abd3be1 100644
--- a/src/calibre/gui2/convert/pdf_output.py
+++ b/src/calibre/gui2/convert/pdf_output.py
@@ -41,4 +41,6 @@ class PluginWidget(Widget, Ui_Form):
             self.opt_pdf_standard_font.addItem(x)
 
         self.initialize_options(get_option, get_help, db, book_id)
+        self.layout().setFieldGrowthPolicy(self.layout().ExpandingFieldsGrow)
+        self.template_box.layout().setFieldGrowthPolicy(self.layout().AllNonFixedFieldsGrow)
 
diff --git a/src/calibre/gui2/convert/pdf_output.ui b/src/calibre/gui2/convert/pdf_output.ui
index 9140301946..205d9f91e6 100644
--- a/src/calibre/gui2/convert/pdf_output.ui
+++ b/src/calibre/gui2/convert/pdf_output.ui
@@ -7,16 +7,13 @@
     <x>0</x>
     <y>0</y>
     <width>638</width>
-    <height>498</height>
+    <height>588</height>
    </rect>
   </property>
   <property name="windowTitle">
    <string>Form</string>
   </property>
   <layout class="QFormLayout" name="formLayout">
-   <property name="fieldGrowthPolicy">
-    <enum>QFormLayout::ExpandingFieldsGrow</enum>
-   </property>
    <item row="0" column="0" colspan="2">
     <widget class="QLabel" name="label_10">
      <property name="text">
@@ -60,10 +57,23 @@
    <item row="3" column="1">
     <layout class="QHBoxLayout" name="horizontalLayout">
      <item>
-      <widget class="QLineEdit" name="opt_custom_size"/>
+      <widget class="QLineEdit" name="opt_custom_size">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+      </widget>
      </item>
      <item>
       <widget class="QLabel" name="label_11">
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Fixed" vsizetype="Preferred">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
        <property name="text">
         <string>&amp;Unit:</string>
        </property>
@@ -178,7 +188,7 @@
     </widget>
    </item>
    <item row="16" column="0" colspan="2">
-    <widget class="QGroupBox" name="groupBox">
+    <widget class="QGroupBox" name="template_box">
      <property name="title">
       <string>Page headers and footers</string>
      </property>