diff --git a/core/Image/Size.php b/core/Image/Size.php
new file mode 100644
index 00000000..ce9b9b79
--- /dev/null
+++ b/core/Image/Size.php
@@ -0,0 +1,64 @@
+<?php
+/**
+ * Class Image size API
+ *
+ * This class handle the image size in WordPress
+ *
+ * @link [URL]
+ * @since 4.0.0
+ *
+ * @package Italystrap
+ */
+
+namespace ItalyStrap\Core\Image;
+
+/**
+ * Class definition
+ */
+class Size {
+
+	/**
+	 * Default image size definitions
+	 *
+	 * @var array
+	 */
+	private $default_image = array();
+
+	/**
+	 * Init the class
+	 *
+	 * @param [type] $argument [description].
+	 */
+	function __construct( array $theme_mods = array() ) {
+		$this->theme_mods = $theme_mods;
+
+		$this->default_image = array(
+			'navbar-brand-image'	=> array(
+				'width'		=> 45,
+				'height'	=> 45,
+				'crop'		=> true,
+			),
+			'full-width'			=> array(
+				'width'		=> 1140,
+				'height'	=> 9999,
+				'crop'		=> false,
+			),
+		);
+	}
+
+	/**
+	 * Register image size
+	 */
+	public function register() {
+	
+		foreach ( $this->default_image as $name => $params ) {
+			add_image_size(
+				$name,
+				$params['width'],
+				$params['height'],
+				$params['crop']
+			);
+		}
+	
+	}
+}
diff --git a/lib/bootstrap.php b/lib/bootstrap.php
index afdf9f4d..ceacd73f 100644
--- a/lib/bootstrap.php
+++ b/lib/bootstrap.php
@@ -20,6 +20,7 @@
 use ItalyStrap\Admin\Required_Plugins\Register as Required_Plugins;
 use ItalyStrap\Admin\Nav_Menu\Register_Nav_Menu_Edit as Register_Nav_Menu_Edit;
 
+use ItalyStrap\Core\Image\Size as Size;
 use ItalyStrap\Core\Init\Init_Theme as Init_Theme;
 use ItalyStrap\Core\Navbar\Navbar as Navbar;
 use ItalyStrap\Core\Sidebars\Sidebars as Sidebars;
@@ -29,7 +30,7 @@
 
 /**
  * Load some static files.
- * Bate version.
+ * Beta version.
  *
  * @var array
  */
@@ -86,6 +87,16 @@
  */
 $theme_mods = wp_parse_args( get_theme_mods(), $defaults );
 
+/**
+ * Register image site
+ * BETA VERSION
+ *
+ * @var ItalyStrap
+ */
+$image_size = new Size( $theme_mods );
+// $image_size->register();
+add_action( 'after_setup_theme', array( $image_size, 'register' ) );
+
 /**
  * Add field for adding glyphicon in menu
  *