array(21) {
  [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(9) "1536x1536"
  [6]=>
  string(9) "2048x2048"
  [7]=>
  string(15) "project-archive"
  [8]=>
  string(14) "project-single"
  [9]=>
  string(17) "project-thumbnail"
  [10]=>
  string(14) "post-thumbnail"
  [11]=>
  string(24) "greentech-category-thumb"
  [12]=>
  string(20) "greentech-post-thumb"
  [13]=>
  string(24) "greentech-post-thumbwide"
  [14]=>
  string(21) "woocommerce_thumbnail"
  [15]=>
  string(18) "woocommerce_single"
  [16]=>
  string(29) "woocommerce_gallery_thumbnail"
  [17]=>
  string(12) "shop_catalog"
  [18]=>
  string(11) "shop_single"
  [19]=>
  string(14) "shop_thumbnail"
  [20]=>
  string(14) "shop_magnifier"
}

array(21) {
  [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(9) "1536x1536"
  [6]=>
  string(9) "2048x2048"
  [7]=>
  string(15) "project-archive"
  [8]=>
  string(14) "project-single"
  [9]=>
  string(17) "project-thumbnail"
  [10]=>
  string(14) "post-thumbnail"
  [11]=>
  string(24) "greentech-category-thumb"
  [12]=>
  string(20) "greentech-post-thumb"
  [13]=>
  string(24) "greentech-post-thumbwide"
  [14]=>
  string(21) "woocommerce_thumbnail"
  [15]=>
  string(18) "woocommerce_single"
  [16]=>
  string(29) "woocommerce_gallery_thumbnail"
  [17]=>
  string(12) "shop_catalog"
  [18]=>
  string(11) "shop_single"
  [19]=>
  string(14) "shop_thumbnail"
  [20]=>
  string(14) "shop_magnifier"
}

array(21) {
  [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(9) "1536x1536"
  [6]=>
  string(9) "2048x2048"
  [7]=>
  string(15) "project-archive"
  [8]=>
  string(14) "project-single"
  [9]=>
  string(17) "project-thumbnail"
  [10]=>
  string(14) "post-thumbnail"
  [11]=>
  string(24) "greentech-category-thumb"
  [12]=>
  string(20) "greentech-post-thumb"
  [13]=>
  string(24) "greentech-post-thumbwide"
  [14]=>
  string(21) "woocommerce_thumbnail"
  [15]=>
  string(18) "woocommerce_single"
  [16]=>
  string(29) "woocommerce_gallery_thumbnail"
  [17]=>
  string(12) "shop_catalog"
  [18]=>
  string(11) "shop_single"
  [19]=>
  string(14) "shop_thumbnail"
  [20]=>
  string(14) "shop_magnifier"
}

array(21) {
  [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(9) "1536x1536"
  [6]=>
  string(9) "2048x2048"
  [7]=>
  string(15) "project-archive"
  [8]=>
  string(14) "project-single"
  [9]=>
  string(17) "project-thumbnail"
  [10]=>
  string(14) "post-thumbnail"
  [11]=>
  string(24) "greentech-category-thumb"
  [12]=>
  string(20) "greentech-post-thumb"
  [13]=>
  string(24) "greentech-post-thumbwide"
  [14]=>
  string(21) "woocommerce_thumbnail"
  [15]=>
  string(18) "woocommerce_single"
  [16]=>
  string(29) "woocommerce_gallery_thumbnail"
  [17]=>
  string(12) "shop_catalog"
  [18]=>
  string(11) "shop_single"
  [19]=>
  string(14) "shop_thumbnail"
  [20]=>
  string(14) "shop_magnifier"
}