WordPress at a glance
filter is not described

woocommerce_thumbnail_size filter-hook . WC 1.0

Thumbnail version.

Usage

add_filter( 'woocommerce_thumbnail_size', 'filter_function_name_2453' );
function filter_function_name_2453( $string ){
	// filter...

	return $string;
}
$string
-

Where the hook is called

wc_get_product_attachment_props()
woocommerce_thumbnail_size
woocommerce/includes/wc-product-functions.php 782
$thumbnail_size       = apply_filters( 'woocommerce_thumbnail_size', 'woocommerce_thumbnail' );

Where in WP core the hook is used WooCommerce

Usage not found.