An idea I've been toying with for a while, which may or may not work:

+

=

?

(images from http://www.statuaryplace.com/store/index.php?main_page=product_info&cPath=5_178&products_id=1798  http://www.burdastyle.com/projects/detachable-peter-pan-collar and http://tribalartbrokers.net/beadcategory.asp?categoryId=4)