wp: additional sizes for insert into post

gistfile1.txt

function f__image_size_names_choose( $sizes ) {
    global $_wp_additional_image_sizes;
        if ( empty($_wp_additional_image_sizes) )
            return $sizes;

    foreach ( $_wp_additional_image_sizes as $id => $data ) {
        if ( !isset($sizes[$id]) )
            $sizes[$id] = ucfirst( str_replace( '-', ' ', $id ) );
    }
    return $sizes;
}