This mask pattern includes three sizes: small for a child or petite adult; medium for most women; and large for most men and will even accommodate their beard. The angled nose and chin pieces are cut with the Creative Grids Spiderweb tool (CGRKA6) to ensure a form fit. And wait until you see how she sews the pleat - pure genius! Pattern includes instructions on how to add an additional filter and a mask bar. Be sure to watch the youtube video before you start.