conditioning showposts

I have this code which works okay for what I wanted but I will probably need to put a condition if there’s only 2 posts then wrap it in a <div class=”large-6″> then if there’s 3 posts then wrap it in large-4.

Just a little confused how to add a condition statement.

`<div class=”row”>
<?php
$query = new WP_Query(array(
‘posts_per_page’ => ‘3’,
‘post_type’ => ‘portfolio’,
‘offset’ => ‘1’
));

while ($query->have_posts()): $query->the_post(); ?>

<div class=”large-4 columns”>
<h5><?php the_title(); ?></h5>
<?php edit_post_link(); // Always handy to have Edit Post Links available ?>
<?php if ( has_post_thumbnail()) : // Check if thumbnail exists ?>
<?php echo get_the_post_thumbnail(); ?>
<?php endif; ?>

</div>
<?php endwhile; ?>
</div>`