Simplicity Sewing Pattern 3046 (Y5) Misses Knit Dress & Sash. Vintage Simplicity 1970's Jiffy knit dress in two lengths and sash sewing pattern. The short or long dress with long kimono sleeves has a high straight neckline and slit in front, V-shaped neckline in back and self-fabric sash or purchased belt slipped thru thread carriers. Dress may be worn with a V-shaped neckline in the front. Short dress is regular length. Long dress is ankle length. Authentic Vintage Reproduction includes additional sizes and cutting layouts.