WordPress at a glance
filter is not described

woocommerce_gallery_thumbnail_size filter-hook . WC 1.0

Gallery thumbnail.

Usage

add_filter( 'woocommerce_gallery_thumbnail_size', 'filter_function_name_8670' );
function filter_function_name_8670( $array ){
	// filter...

	return $array;
}
$array
-

Where the hook is called

wc_get_product_attachment_props()
woocommerce_gallery_thumbnail_size
wc_get_gallery_image_html()
woocommerce_gallery_thumbnail_size
woocommerce/includes/wc-product-functions.php 775
$gallery_thumbnail_size           = apply_filters( 'woocommerce_gallery_thumbnail_size', array( $gallery_thumbnail['width'], $gallery_thumbnail['height'] ) );
woocommerce/includes/wc-template-functions.php 1504
$thumbnail_size    = apply_filters( 'woocommerce_gallery_thumbnail_size', array( $gallery_thumbnail['width'], $gallery_thumbnail['height'] ) );

Where in WP core the hook is used WooCommerce

Usage not found.