diff --git a/incorporealcms/static/css/base.css b/incorporealcms/static/css/base.css
index 08998ad..4db8c94 100644
--- a/incorporealcms/static/css/base.css
+++ b/incorporealcms/static/css/base.css
@@ -11,16 +11,15 @@ body {
     -webkit-text-size-adjust: 100%;
 }
 
-.site-wrap {
+.site-wrap-normal-width {
     max-width: 70pc;
-    min-height: 100vh;
-    margin: 0;
-    margin-left: auto;
-    margin-right: auto;
 }
 
-.site-wrap-wide {
-    max-width: 95pc;
+.site-wrap-double-width {
+    max-width: 140pc;
+}
+
+.site-wrap {
     min-height: 100vh;
     margin: 0;
     margin-left: auto;
diff --git a/incorporealcms/templates/base-wide.html b/incorporealcms/templates/base-wide.html
index 569e857..e5cdb42 100644
--- a/incorporealcms/templates/base-wide.html
+++ b/incorporealcms/templates/base-wide.html
@@ -1,2 +1,2 @@
 {% extends "base.html" %}
-{% block site_class %}class="wide-site-wrap"{% endblock %}
+{% block site_class %}class="site-wrap site-wrap-double-width"{% endblock %}
diff --git a/incorporealcms/templates/base.html b/incorporealcms/templates/base.html
index da26990..f598a29 100644
--- a/incorporealcms/templates/base.html
+++ b/incorporealcms/templates/base.html
@@ -10,7 +10,7 @@
 <link rel="stylesheet" href="{{ url_for('static', filename=user_style) }}">
 <link rel="icon" href="{% if config.FAVICON %}{{ config.FAVICON }}{% else %}{{ url_for('static', filename='img/favicon.png') }}{% endif %}">
 
-<div {% block site_class %}class="site-wrap"{% endblock %}>
+<div {% block site_class %}class="site-wrap site-wrap-normal-width"{% endblock %}>
     {% block header %}
     <div class="header">
         <div class="nav">
diff --git a/tests/functional_tests.py b/tests/functional_tests.py
index 6054990..7fe63aa 100644
--- a/tests/functional_tests.py
+++ b/tests/functional_tests.py
@@ -198,8 +198,8 @@ def test_setting_selected_style_includes_cookie(client):
 def test_pages_can_supply_alternate_templates(client):
     """Test that pages can supply templates other than the default."""
     response = client.get('/')
-    assert b'class="site-wrap"' in response.data
-    assert b'class="wide-site-wrap"' not in response.data
+    assert b'class="site-wrap site-wrap-normal-width"' in response.data
+    assert b'class="site-wrap site-wrap-double-width"' not in response.data
     response = client.get('/custom-template')
-    assert b'class="site-wrap"' not in response.data
-    assert b'class="wide-site-wrap"' in response.data
+    assert b'class="site-wrap site-wrap-normal-width"' not in response.data
+    assert b'class="site-wrap site-wrap-double-width"' in response.data