Reverse Shell Border
The reverse shell border is a twist on the traditional shell border
that is used to finish the edges of your cake. This cake decorating
technique is used a lot on the top edge of the cake with the
regular
shell border along the bottom edge.

Tip #'s 16-21 work best for a border with reverse shells. Remember
the
smaller the number the smaller the decoration and vice versa.
I have included a cake decorating video to help you learn this simple
cake decorating technique. A list of supplies and written instructions
are also included below the video.
Video-Cake Decorating Techniques