1
First of all you want to wash the shells dipping them in water with a teaspoon of bleach and rub them with a brush to take off all incrustations.
this will avoid the shells to stink..
2
Now choose the thread and lay out the shells onto the bikini the way you want them to look...
3
sew the shells along the bikini edge and fix them with a knot on the back
4
Go all the way down and you're done ;)