Modifying WooCommerce Breadcrumbs structure to show home/shop-page/product-name

custom_crumbs.php

/**
 * Update Breadcrumbs structure
 *
 */
/* This function will go inside your child functions.php file of your theme */

function pf_custom_crumbs( $crumbs ) {

	$newcrumbs = array();

	// first crumb is the home
	$newcrumbs[] = $crumbs[0];

	// Now insert the shop
	$newcrumbs[] = array( 'shop', get_permalink( woocommerce_get_page_id( 'shop' ) ) );

	// Now insert the last crumb (i.e., the product)
	$newcrumbs[] = $crumbs[sizeof($crumbs)-1];

	return $newcrumbs;

}

add_filter('woocommerce_get_breadcrumb', 'pf_custom_crumbs');