I really like interchangeable earrings ideas.  I've covered this particular idea before (see first link below) but it is always good to be reminded again.   This stud earrings tutorial by Alyssa  (no longer available) over on Hello Whimsy, shows you how to add dangles at the back.  She shows off all the different dangles with the same pair of stud earrings.

It is achieved with jump rings through the butterfly backs.  Other types of backs will not work.

Some people may not be able to wear long earrings at work. So you can now wear the stud earrings as they are or change out the dangles as you please!

Before You Go:

Original Post by THE BEADING GEM
Jewelry Making Tips - Jewelry Business Tips