Simplicity Sewing Pattern S9344 Misses’ Knit Costume and Face Mask. Officially-licensed Sally costume starts with an easy knit pullover dress with jagged short sleeves and below knee hemline. Full length knit leggings have elastic waist and stitch detail. Long fingerless gloves have thumb hole, narrow hems and novelty stitching. An easy face mask with Sally’s trademark smile appliqued on finishes the look.