Example Illustrator script to create a pop-up with dropdown list to change artboards to pre-selected sizes.

resize-artboards-dropdown.js

var docRef = app.activeDocument;

var dialog = new Window("dialog");
dialog.text = "Escolha Cilindro";
dialog.preferredSize.width = 400;
dialog.orientation = "column";
dialog.alignChildren = ["left", "top"];
dialog.spacing = 10;
dialog.margins = 16;

var _list_array = [
    "130,18",
    "133,35",
    "136,53"
];

var _list = dialog.add(
    "dropdownlist", 
    undefined, 
    undefined, { 
        name: "_list", 
        items: _list_array 
    }
);

_list.selection = 0;
_list.alignment = ["left", "top"];

function doResizeArtboards(width, height) {
    if (app.documents.length === 0) {
        alert("There are no open documents.");
        return;
    }
    var theDoc = app.activeDocument;
    try {
        for (i = 0; i < theDoc.artboards.length; i++) {

            /**
             * Bounds are always: [left, top, right, bottom]
             */
            var abBounds = theDoc.artboards[i].artboardRect; 

            /** Legend:
             *  - abctrx   = artboard center x
             *  - abctry   = artboard center y
             *  - abwidth  = artboard width
             *  - abheight = artboard height
             */

            var left     = abBounds[0];
            var top      = abBounds[1];
            var abwidth  = abBounds[2] - left;
            var abheight = top - abBounds[3];

            var abctrx   = abwidth / 2 + left;
            var abctry   = top - abheight / 2;

            var left     = abctrx - width / 2;
            var top      = abctry + height / 2;
            var right    = abctrx + width / 2;
            var bottom   = abctry - height / 2;

            theDoc.artboards[i].artboardRect = [
                left, 
                top, 
                right, 
                abbottom
            ];
        }
    }
    catch (e) { alert(e.message) }
}

dialog.onChange = function() {
    var _selected = _list.selection.text;
    var dims = _selected.split(",");
    var width = dims[0];
    var height = dims[1];
    doResizeArtboards(width, height);
}

dialog.show();