Как изменить micro на small

<img src="<?php echo html_image_src($item[$image_field], 'big', true); ?>" class="slide-<?php echo $id; ?>">

($item[$image_field], 'big', true)

 
<?php if ($is_avatars) { ?>
     <a class="item item-avatar" href="<?php echo $url; ?>" title="<?php html($profile['nickname']); ?>"><?php echo html_avatar_image($profile['avatar'], 'micro'); ?></a>
...
 

<a class="item item-avatar" href="<?php echo $url; ?>" title="<?php html($profile['nickname']); ?>"><?php echo html_avatar_image($profile['avatar'], 'small'); ?></a>