modal size

.xx-dialog .modal-dialog {
    width :90%;
    min-width: 800px;
}

modalInstance = $modal.open({
        templateUrl: 'templates/editxxx.html',
        controller: EditXXCtrl,
        windowClass: 'xx-dialog',
        resolve: {
            xx_uuid: function () {
                return xx_guid;
            }
        }
    });