diff --git a/field_slideshow.module b/field_slideshow.module
index e3eb071..e51bda9 100644
--- a/field_slideshow.module
+++ b/field_slideshow.module
@@ -75,7 +75,11 @@ function field_slideshow_field_formatter_settings_form($field, $instance, $view_
     '#empty_option'   => t('None (original image)'),
     '#options'        => image_style_options(FALSE),
   );
-
+  $element['slideshow_fullwidth'] = array(
+    '#title'          => t('full width'),
+    '#type'           => 'checkbox',
+    '#default_value'  => $settings['slideshow_fullwidth'],
+  );
   $links = array(
     'content' => t('Content'),
     'file'    => t('File'),
@@ -572,6 +576,7 @@ function field_slideshow_field_formatter_view($entity_type, $entity, $field, $in
   // Needed when upgrading to 1.1
   if (!isset($settings['slideshow_order'])) $settings['slideshow_order'] = '';
   if (!isset($settings['slideshow_carousel_image_style'])) $settings['slideshow_carousel_image_style'] = '';
+  if (!isset($settings['slideshow_fullwidth'])) $settings['slideshow_fullwidth'] = 0;
   if (!isset($settings['slideshow_carousel_visible'])) $settings['slideshow_carousel_visible'] = '3';
   if (!isset($settings['slideshow_carousel_scroll'])) $settings['slideshow_carousel_scroll'] = '1';
   if (!isset($settings['slideshow_carousel_speed'])) $settings['slideshow_carousel_speed'] = '500';
@@ -754,6 +759,7 @@ function field_slideshow_field_formatter_view($entity_type, $entity, $field, $in
       '#theme'                => 'field_slideshow',
       '#items'                => $items,
       '#image_style'          => $settings['slideshow_image_style'],
+      '#fullwidth'            => $settings['slideshow_fullwidth'],
       '#order'                => $settings['slideshow_order'],
       '#controls'             => ($settings['slideshow_controls'] === 1 ? $controls : array()),
       '#controls_position'    => $settings['slideshow_controls_position'],
@@ -793,6 +799,7 @@ function field_slideshow_theme() {
       'variables'     => array(
         'items'                 => NULL,
         'image_style'           => NULL,
+        'fullwidth'             => NULL,
         'order'                 => NULL,
         'controls'              => NULL,
         'controls_pause'        => NULL,
@@ -895,6 +902,9 @@ function template_preprocess_field_slideshow(&$variables) {
     if (isset($item['width']) && isset($item['height'])) {
       $image['width'] = $item['width'];
       $image['height'] = $item['height'];
+        if(isset($variables['fullwidth']) && $variables['fullwidth'] == 1) {
+          $image['width'] = "100%";
+        }
     }
     else {
       $image_dims = getimagesize($image['path']);