array(17) { [0]=> string(9) "thumbnail" [1]=> string(6) "medium" [2]=> string(12) "medium_large" [3]=> string(5) "large" [4]=> string(5) "vp_sm" [5]=> string(5) "vp_md" [6]=> string(5) "vp_lg" [7]=> string(5) "vp_xl" [8]=> string(10) "thumb-1440" [9]=> string(9) "thumb-780" [10]=> string(9) "thumb-360" [11]=> string(21) "woocommerce_thumbnail" [12]=> string(18) "woocommerce_single" [13]=> string(29) "woocommerce_gallery_thumbnail" [14]=> string(12) "shop_catalog" [15]=> string(11) "shop_single" [16]=> string(14) "shop_thumbnail" }