It depends on your body weight or how big is you specific area fat is.
We do recommend an Overweight person apply 2 pcs (Morning & Night) of patches for 8 hours per pcs. For the best result, Apply it for 6 months continuously.
For a tubby person, we recommended applying 1 pcs per day for 8 hours for 3 months continuously.
*You may add more pieces according to your need.