$image = field_get_items('user', $user, 'field_image');
    $output = field_view_value('user', $user, 'field_image', $image[0], array(
      'type' => 'image',
      'settings' => array(
        'image_style' => 'header_image_160x160',
      ),
    ));
    print render($output);

<img src="https://coinme.io/sites/default/files/styles/header_image_160x160/public?itok=f31sbmSd" width="160" height="160" alt="">

$to_render = field_view_field('user', $user, 'field_image', array('settings' => array('image_style' => 'header_image_160x160'))); print render($to_render);

<?php $to_render = field_view_field('node', $node, 'field_image', array('settings' => array('image_style' => 'header_image_160x160'))); print render($to_render);?>

<?php $account = $elements['#account'];?>

<?php $to_render = field_view_field('user', $account, 'field_image', array('settings' => array('image_style' => 'header_image_160x160'))); print render($to_render);?>