copy-size.jsx

(function (thisObj) {
  /**
   * This Script copies the size of one pageItem to another
   */
  main();

  function main() {
    if (app.activeDocument.selection.length < 2) {
      alert("select 2 items");
      return;
    }
    var srcitem = app.activeDocument.selection[0];
    var targetitem = app.activeDocument.selection[1];


    var srcgb = srcitem.geometricBounds;
    var trggb = targetitem.geometricBounds;
    var W = srcgb[3] - srcgb[1];
    var H = srcgb[2] - srcgb[0];

    var newgb = [trggb[0], trggb[1], trggb[0] + H, trggb[1] + W];

    targetitem.geometricBounds = newgb;
    targetitem.fit(FitOptions.CENTER_CONTENT);
    targetitem.fit(FitOptions.PROPORTIONALLY);
  }
})(this);