Simplicity 5507; ©1973; Princess Dress and Unlined Jacket in Half Sizes. Look Slimmer Pattern. The sleeveless, princess seamed dress with back zipper has low square neckline, front pleats, self fabric tie belt, top stitching and optional button trim. The unlined jacket with edges encased in fold over braid has collar, short set-in sleeves and patch pockets. The tie belt may be worn with dress or jacket.