Display sizes not only in Kb

I added this small function to display the sizes not only in KB

public function sizeFilter( $bytes )
{
    $label = array( 'B', 'KB', 'MB', 'GB', 'TB', 'PB' );
    for( $i = 0; $bytes >= 1024 && $i < ( count( $label ) -1 ); $bytes /= 1024, $i++ );
            return( round( $bytes, 2 ) . " " . $label[$i] );
}

line 62:
$displayoriginalspace = sizeFilter($originalspace);
line 67:
$displaytotalspace = sizeFilter($totalspace);

http://wordpress.org/extend/plugins/media-file-sizes/