File Size Display

function edd_ck_show_file_sizes( $post_id ) {

	$files = edd_get_download_files( $post_id, null );

	$decimals = 2;

	$sz = 'BKMGTP';

	$header = _n( 'File Size', 'File Sizes', count( $files ), 'edd' );

	echo '<h5>' . $header . '</h5>';

	echo '<ul>';

	foreach( $files as $file ) {

		$bytes = filesize( get_attached_file( $file['attachment_id'] ) );

		$factor = floor((strlen($bytes) - 1) / 3);

		echo '<li>' . $file['name'] . ' - ' . sprintf( "%.{$decimals}f", $bytes / pow( 1024, $factor) ) . @$sz[$factor] . '</li>';

	}

	echo '</ul>';

}

add_action( 'edd_after_download_content', 'edd_ck_show_file_sizes', 10, 1 );