diff --git a/web_dialog_size/README.rst b/web_dialog_size/README.rst
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+++ b/web_dialog_size/README.rst
@@ -0,0 +1,28 @@
+Expand Dialog
+=============
+
+A module that lets the user expand a dialog box to the full screen width.
+
+It is named web_dialog_size as it could be extended to propose other dialog size management feature.
+
+Credits
+=======
+
+Contributors
+------------
+
+* Anthony Muschang <anthony.muschang@acsone.eu>
+* Stéphane Bidoul <stephane.bidoul@acsone.eu>
+
+Maintainer
+----------
+
+.. image:: http://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: http://odoo-community.org
+
+This module is maintained by the OCA.
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose mission is to support the collaborative development of Odoo features and promote its widespread use.
+
+To contribute to this module, please visit http://odoo-community.org.
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diff --git a/web_dialog_size/__init__.py b/web_dialog_size/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/web_dialog_size/__openerp__.py b/web_dialog_size/__openerp__.py
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+++ b/web_dialog_size/__openerp__.py
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+# -*- coding: utf-8 -*-
+##############################################################################
+#
+#     This file is part of web_dialog_sizes, an Odoo module.
+#
+#     Copyright (c) 2015 ACSONE SA/NV (<http://acsone.eu>)
+#
+#     web_expand_dialog is free software: you can redistribute it and/or
+#     modify it under the terms of the GNU Affero General Public License
+#     as published by the Free Software Foundation, either version 3 of
+#     the License, or (at your option) any later version.
+#
+#     web_expand_dialog is distributed in the hope that it will be useful,
+#     but WITHOUT ANY WARRANTY; without even the implied warranty of
+#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#     GNU Affero General Public License for more details.
+#
+#     You should have received a copy of the
+#     GNU Affero General Public License
+#     along with web_expand_dialog.
+#     If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+{
+    'name': "Web Dialog Size",
+
+    'summary': """
+        A module that lets the user expand a
+        dialog box to the full screen width.""",
+
+    'author': "ACSONE SA/NV",
+    'website': "http://acsone.eu",
+
+    'category': 'web',
+    'version': '0.1',
+    'license': 'AGPL-3',
+
+    'depends': [
+        'web',
+    ],
+    'qweb': [
+        'static/src/xml/web_dialog_size.xml',
+    ],
+    'data': [
+        'view/qweb.xml',
+    ],
+}
diff --git a/web_dialog_size/static/src/css/web_dialog_size.css b/web_dialog_size/static/src/css/web_dialog_size.css
new file mode 100644
index 00000000..10fba0f0
--- /dev/null
+++ b/web_dialog_size/static/src/css/web_dialog_size.css
@@ -0,0 +1,17 @@
+.modal .modal-header button.dialog_button_extend {
+  padding-top: 0px;
+  padding-right: 3px;
+}
+
+.modal .modal-header button.dialog_button_restore {
+  padding-top: 1px;
+  padding-right: 5px;
+}
+
+.modal .modal-header .dialog_button_hide {
+    display: none;
+}
+
+.dialog_full_screen {
+    width: calc(100% - 50px);
+}
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diff --git a/web_dialog_size/static/src/js/web_dialog_size.js b/web_dialog_size/static/src/js/web_dialog_size.js
new file mode 100644
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+++ b/web_dialog_size/static/src/js/web_dialog_size.js
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+openerp.web_dialog_size= function (instance) {
+
+    instance.web.Dialog =  instance.web.Dialog.extend({
+
+        init_dialog: function () {
+            var self = this;
+            this._super();
+            self.$dialog_box.find('.dialog_button_restore').addClass('dialog_button_hide');
+            if (this.dialog_options.size !== 'large'){
+                self.$dialog_box.find('.dialog_button_extend').addClass('dialog_button_hide');
+            }
+            else{
+                self.$dialog_box.find('.dialog_button_extend').on('click', self._extending);
+                self.$dialog_box.find('.dialog_button_restore').on('click', self._restore);
+            }
+        },
+
+        _extending: function() {
+            var self = this;
+            $(this).parents('.modal-dialog').addClass('dialog_full_screen');
+            $(this).addClass('dialog_button_hide');
+
+            $(this).parents('.modal-dialog').find('.dialog_button_restore').removeClass('dialog_button_hide')
+        },
+
+        _restore: function() {
+            var self = this;
+            $(this).parents('.modal-dialog').removeClass('dialog_full_screen');
+            $(this).addClass('dialog_button_hide');
+
+            $(this).parents('.modal-dialog').find('.dialog_button_extend').removeClass('dialog_button_hide')
+        },
+
+    });
+
+};
+
diff --git a/web_dialog_size/static/src/xml/web_dialog_size.xml b/web_dialog_size/static/src/xml/web_dialog_size.xml
new file mode 100644
index 00000000..1808dd2a
--- /dev/null
+++ b/web_dialog_size/static/src/xml/web_dialog_size.xml
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+<?xml version="1.0" encoding="UTF-8"?>
+<templates id="template" xml:space="preserve">
+    <t t-extend="Dialog">
+        <t t-jquery="button" t-operation="after">
+             <button type="button" class="dialog_button_extend close">o</button>
+             <button type="button" class="dialog_button_restore close">-</button>
+        </t>
+    </t>
+</templates>
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diff --git a/web_dialog_size/view/qweb.xml b/web_dialog_size/view/qweb.xml
new file mode 100644
index 00000000..31dcd70f
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+++ b/web_dialog_size/view/qweb.xml
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+<openerp>
+    <data>
+       <template id="assets_backend" name="web_dialog_size assets" inherit_id="web.assets_backend">
+            <xpath expr="." position="inside">
+                <link rel="stylesheet" href="/web_dialog_size/static/src/css/web_dialog_size.css"/>
+                <script type="text/javascript" src="/web_dialog_size/static/src/js/web_dialog_size.js"></script>
+            </xpath>
+        </template>
+    </data>
+</openerp>
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