diff --git a/src/Grafika/EditorInterface.php b/src/Grafika/EditorInterface.php
index e240942..9c69131 100644
--- a/src/Grafika/EditorInterface.php
+++ b/src/Grafika/EditorInterface.php
@@ -151,7 +151,7 @@ public function open( &$image, $imageFile );
      * @param ImageInterface $image Instance of Image.
      * @param int $newWidth Width in pixels.
      * @param int $newHeight Height in pixels.
-     * @param string $mode Resize mode. Possible values: "exact", "exactHeight", "exactWidth", "fill", "fit".
+     * @param string $mode Resize mode. Possible values: "exact", "exactHeight", "exactWidth", "fill", "fit", "letterbox".
      *
      * @return EditorInterface An instance of Editor.
      */
@@ -210,6 +210,18 @@ public function resizeFill( &$image, $newWidth, $newHeight );
      */
     public function resizeFit( &$image, $newWidth, $newHeight );
 
+    /**
+     * Resize an image to fit within the given width and height, then fill out the remaining space with a background color. The re-sized image + color fill will exactly match the given dimensions. Useful if you want to preserve the aspect ratio but also fill out an exact size.
+     *
+     * @param ImageInterface $image Instance of Image.
+     * @param int $newWidth Width in pixels.
+     * @param int $newHeight Width in pixels.
+     * @param Color $color The Color object containing the background color.
+     *
+     * @return EditorInterface An instance of Editor.
+     */
+    public function resizeLetterbox( &$image, $newWidth, $newHeight, $color);
+
     /**
      * Rotate an image counter-clockwise.
      *
diff --git a/src/Grafika/Gd/Editor.php b/src/Grafika/Gd/Editor.php
index 1fb29a5..a750e44 100644
--- a/src/Grafika/Gd/Editor.php
+++ b/src/Grafika/Gd/Editor.php
@@ -504,7 +504,7 @@ public function open(&$image, $imageFile){
      * @param Image $image
      * @param int $newWidth Width in pixels.
      * @param int $newHeight Height in pixels.
-     * @param string $mode Resize mode. Possible values: "exact", "exactHeight", "exactWidth", "fill", "fit".
+     * @param string $mode Resize mode. Possible values: "exact", "exactHeight", "exactWidth", "fill", "fit", "letterbox".
      *
      * @return Editor
      * @throws \Exception
@@ -533,6 +533,9 @@ public function resize(&$image, $newWidth, $newHeight, $mode = 'fit')
             case 'fit':
                 $this->resizeFit($image, $newWidth, $newHeight);
                 break;
+            case 'letterbox':
+                $this->resizeLetterbox($image, $newWidth, $newHeight, new Color('#FFFFFF'));
+                break;
             default:
                 throw new \Exception(sprintf('Invalid resize mode "%s".', $mode));
         }
@@ -665,6 +668,30 @@ public function resizeFit(&$image, $newWidth, $newHeight)
         return $this;
     }
 
+    /**
+     * Resize image to fit within the given width and height, then fill out the remaining space with a background color.
+     *
+     * @param Image $image
+     * @param int $newWidth Width in pixels.
+     * @param int $newHeight Height in pixels.
+     * @param Color $color The Color object containing the background color.
+     *
+     * @return Editor
+     */
+    public function resizeLetterbox(&$image, $newWidth, $newHeight, $color)
+    {
+
+        $canvas = Grafika::createBlankImage($newWidth, $newHeight);
+        $this->fill($canvas, $color);
+
+        $this->resizeFit($image, $newWidth, $newHeight);
+
+        $this->blend($canvas, $image, 'normal', 1, 'center');
+        $image = $canvas;
+
+        return $this;
+    }
+
     /**
      * Rotate an image counter-clockwise.
      *
diff --git a/src/Grafika/Imagick/Editor.php b/src/Grafika/Imagick/Editor.php
index 36d698f..985517a 100644
--- a/src/Grafika/Imagick/Editor.php
+++ b/src/Grafika/Imagick/Editor.php
@@ -402,7 +402,7 @@ public function open(&$image, $imageFile){
      * @param Image $image
      * @param int $newWidth Width in pixels.
      * @param int $newHeight Height in pixels.
-     * @param string $mode Resize mode. Possible values: "exact", "exactHeight", "exactWidth", "fill", "fit".
+     * @param string $mode Resize mode. Possible values: "exact", "exactHeight", "exactWidth", "fill", "fit", "letterbox".
      *
      * @return Editor
      * @throws \Exception
@@ -431,6 +431,9 @@ public function resize(&$image, $newWidth, $newHeight, $mode = 'fit')
             case 'fit':
                 $this->resizeFit($image, $newWidth, $newHeight);
                 break;
+            case 'letterbox':
+                $this->resizeLetterbox($image, $newWidth, $newHeight, new Color('#FFFFFF'));
+                break;
             default:
                 throw new \Exception(sprintf('Invalid resize mode "%s".', $mode));
         }
@@ -563,6 +566,30 @@ public function resizeFit(&$image, $newWidth, $newHeight)
         return $this;
     }
 
+    /**
+     * Resize image to fit within the given width and height, then fill out the remaining space with a background color.
+     *
+     * @param Image $image
+     * @param int $newWidth Width in pixels.
+     * @param int $newHeight Height in pixels.
+     * @param Color $color The Color object containing the background color.
+     *
+     * @return Editor
+     */
+    public function resizeLetterbox(&$image, $newWidth, $newHeight, $color)
+    {
+
+        $canvas = Grafika::createBlankImage($newWidth, $newHeight);
+        $this->fill($canvas, $color);
+
+        $this->resizeFit($image, $newWidth, $newHeight);
+
+        $this->blend($canvas, $image, 'normal', 1, 'center');
+        $image = $canvas;
+
+        return $this;
+    }
+
     /**
      * Rotate an image counter-clockwise.
      *