We'll need to make the cord a little longer if over a Sink

This answer will help us in sending the correct hardware

We use Shrouded Cords, which means the cords are covered and cannot be "pulled out" from the shrouded. These cords are $15.00 extra per roman, to be collected at shipping with your balance. ALTHOUGH THESE CORDS ARE DESIGNED TO PROTECT CHILDREN FROM A CHOKING HAZARD, CHILDREN SHOULD BE WATCHED AT ALL TIMES, THEREFORE WE RELINQUISH ALL RESPONSIBILITY TOWARD OUR PRODUCTS SAFETY.

This Cord Lock System works like a venetian blind, locking roman in place, but remember you will still have a cord to contend with, every time you draw the shade, which you will wrap around a cleat. This SYSTEM cost $50.00 extra, which will be collected at shipping with your balance.
THIS SYSTEM IS NOT NECESSARY, IT IS JUST A PERSONAL PREFERENCE.