If I for example filter my custom post type by date and it only shows 2 records on screen, I only want to export those 2 records, but it is exporting a bunch of records out of my control ie: the wrong records.

How can I modify this to only export what is showing up on screen ie: the 2 records in this case?

add_action( 'init', 'func_export_some_records' );
function func_export_all_posts() {
    if(isset($_GET['export_some_records'])) {
        $arg = array(
                'post_type' => 'shirts',
                'fields' => 'ids'
            );


        global $post;
        $arr_post = get_posts($arg);
        if ($arr_post) {

            header("Content-Description: File Transfer");
            header("Content-Type: application/csv");
            header('Content-Disposition: attachment; filename="wp.csv"');
            header('Pragma: no-cache');
            header('Expires: 0');

            $file = fopen('php://output', 'w');

            fputcsv($file, array('COLUMN ONE', 'COLUMN TWO'));

            foreach ($arr_post as $post) {

                $color = get_post_meta( $post, 'user-color', true );
                $size = get_post_meta( $post, 'user-size', true );

                fputcsv($file, array($color, $size));
            }


            fclose($file);

        }
    }
}

Here is the button that triggers the download:

add_action( 'manage_posts_extra_tablenav', 'admin_post_list_top_export_button', 20, 1 );
function admin_post_list_top_export_button( $which ) {
    global $typenow;

    if ( 'shirts' === $typenow && 'top' === $which ) {
        ?>
        <input type="submit" name="export_some_records" id="export_some_records" class="button button-primary" value="Export Some Records" />
        <?php
    }

}

One way I thought of but not actually sure how to achieve is to get all the post ID’s currently on screen and then in my $arg array use 'includes' => 'post id here'