array(11) { [0]=> string(9) "thumbnail" [1]=> string(6) "medium" [2]=> string(12) "medium_large" [3]=> string(5) "large" [4]=> string(22) "wysija-newsletters-max" [5]=> string(21) "woocommerce_thumbnail" [6]=> string(18) "woocommerce_single" [7]=> string(29) "woocommerce_gallery_thumbnail" [8]=> string(12) "shop_catalog" [9]=> string(11) "shop_single" [10]=> string(14) "shop_thumbnail" }