Heat oven to 400°F. Onto ungreased cookie sheet, unroll dough; brush dough with 2 tablespoons of the melted butter. In small bowl, mix sugar and cinnamon; sprinkle 2 tablespoons evenly over dough. Fold short sides of dough to meet in center, overlapping slightly; shape into 10x11-inch oval for mask. Brush with remaining 1 tablespoon melted butter; sprinkle with remaining cinnamon-sugar.