How to pass image size to WP ACF?

Question

WordPress

Hello. There is a gallery output code

<?php
         if( have_rows('gallery_single') ): ?>
              <?php while ( have_rows('gallery_single') ) : the_row(); ?>
                     <li class="thumbnails__item px-2" role="button" tabindex="1">
                          <img src="<?php the_sub_field('gallery_single_photo'); ?>" alt="" class="mx-auto" width="100px">
                     </li>
              <?php endwhile; ?>
        <?php endif;
?>

How to pass image size to it by type: thumbnail, medium, medium_large, large.
Now, according to the standard, the full size of images is displayed.