Alter WooCommerce Product Weight and Dimension Dynamically

functions.php

 function filter_get_hook_prefix_weight($this_weight, $instance) {

     if (!$this_weight || $this_weight < 0.6)  $this_weight = .6;
     return $this_weight;
 }

 function filter_get_hook_prefix_height($this_height, $instance) {

     if (!$this_height || $this_height < 20 ) $this_height = 20;
     return $this_height;
 }

 function filter_get_hook_prefix_width($this_width, $instance) {

     if (!$this_width || $this_width < 20 )  $this_width = 20;
     return $this_width;
 }

 function filter_get_hook_prefix_length($this_length, $instance) {

     if (!$this_length || $this_length < 20 ) $this_length = 20;
     return $this_length;
 }

 add_filter("woocommerce_product_get_height", 'filter_get_hook_prefix_height', 19, 2);
 add_filter("woocommerce_product_get_width",  'filter_get_hook_prefix_width',  19, 2);
 add_filter("woocommerce_product_get_length", 'filter_get_hook_prefix_length', 19, 2);
 add_filter("woocommerce_product_get_weight", 'filter_get_hook_prefix_weight', 19, 2);