This is an interesting set! It allows you to address envelopes easily and works for any size. I would have liked to see directions on how to use this product, even shampoo has directions. I was not sure if I was suppose to fill the whole area with letters or just use it as a ruler. Overall I like the quality of these and think they will be helpful in the future for evently spaced writing! This set comes with four different stencils to match up with any address or envelope you have. The price for this set is good and I would reccomend this purchase to other interested in it.