Updating changes of size.

app/design/frontend/Sm/shop4u/Magento_Catalog/templates/product/view/details.phtml

@@ -8,6 +8,52 @@
 $_config  = $this->helper('Sm\Shop4u\Helper\Data');
 $tabStyle = $_config->getProductDetail('tab_style');
 
+
+
+      
+        $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
+	$registry = $objectManager->get('\Magento\Framework\Registry');
+	$currentProduct = $registry->registry('current_product');
+        $product = $objectManager->get('Magento\Catalog\Model\Product')->load($currentProduct->getId());
+        $length =  $product->getCustomAttribute('ts_dimensions_length')->getValue();
+        $width = $product->getCustomAttribute('ts_dimensions_width')->getValue();
+        if (!empty($width) && !empty($length)) {        ?>
+		<script>
+	require([
+            'jquery',
+        ], function ($) {
+            'use strict';
+          if (jQuery('#product_addtocart_form').find('.product-options-wrapper').length) {
+	setTimeout(function(){
+            var config = {
+              S: 10,
+              M: 20,
+              L: 30,
+              XL: 40,
+              XXL: 50,
+              XXXL: 60,
+            };
+            var baseHeight = <?php echo $length; ?>;
+            var baseWidth = <?php echo $width; ?>;
+	jQuery('#product_addtocart_form #select_2 option').each(function(){
+	   	var $this = $(this);
+		var value = $this.text();
+	      var percent = parseInt(config[value]);
+		console.log("------------------------", `==${value}==`, percent, config, config[value]);
+	      if (percent && percent > 0) {
+	        var heigth = parseInt(baseHeight + (baseHeight * percent / 100));
+	        var width = parseInt(baseWidth + (baseWidth * percent / 100));
+	        $this.text(`${value} (${heigth}x${width} CM)`);
+	      }
+	    });
+	  }, 2000);
+          }
+	});
+	</script>
+
+        <?php }
+       
+
 $show_custom_tab   = $_config->getProductDetail('show_custom_tab');
 $custom_tab_name   = $_config->getProductDetail('custom_tab_name');
 $customtab_content = $_config->getProductDetail('customtab_content');