diff --git a/css/google_currency_converter.css b/css/google_currency_converter.css
new file mode 100644
index 0000000..11b8b23
--- /dev/null
+++ b/css/google_currency_converter.css
@@ -0,0 +1,3 @@
+.gcc-select-list {
+ width: 250px;
+}
diff --git a/google_currency_converter.libraries.yml b/google_currency_converter.libraries.yml
new file mode 100644
index 0000000..01edf9b
--- /dev/null
+++ b/google_currency_converter.libraries.yml
@@ -0,0 +1,4 @@
+gcc:
+  css:
+    theme:
+      css/google_currency_converter.css: {}
diff --git a/src/Form/GoogleCurrencyConverterForm.php b/src/Form/GoogleCurrencyConverterForm.php
index d0d6d1f..b59823b 100644
--- a/src/Form/GoogleCurrencyConverterForm.php
+++ b/src/Form/GoogleCurrencyConverterForm.php
@@ -55,6 +55,7 @@ class GoogleCurrencyConverterForm extends FormBase {
       '#title' => t('Select Your Currency From'),
       '#options' => $this->googleCurrencyConveter->countries(),
       '#default_value' => '',
+      '#attributes' => array('class' => array('gcc-select-list')),
       '#required' => TRUE,
     );
     $form['google_currency_converter_to'] = array(
@@ -62,6 +63,7 @@ class GoogleCurrencyConverterForm extends FormBase {
       '#title' => t('Select Your Currency To'),
       '#options' => $this->googleCurrencyConveter->countries(),
       '#default_value' => '',
+      '#attributes' => array('class' => array('gcc-select-list')),
       '#required' => TRUE,
     );
     $form['amount'] = array(
diff --git a/src/Plugin/Block/GoogleCurrencyConverterBlock.php b/src/Plugin/Block/GoogleCurrencyConverterBlock.php
index 1f181dc..cdac8e1 100644
--- a/src/Plugin/Block/GoogleCurrencyConverterBlock.php
+++ b/src/Plugin/Block/GoogleCurrencyConverterBlock.php
@@ -103,6 +103,7 @@ class GoogleCurrencyConverterBlock extends BlockBase implements ContainerFactory
     $form = \Drupal::formBuilder()->getForm('Drupal\google_currency_converter\Form\GoogleCurrencyConverterForm');
     $form['google_currency_converter_from']['#default_value'] = $config['google_currency_converter_from'];
     $form['google_currency_converter_to']['#default_value'] = $config['google_currency_converter_to'];
+    $render[]['#attached']['library'][] = 'google_currency_converter/gcc';
     $render['google_currency_converter_form'] = $form;
     return $render;
   }