Simplicity 4971; ©1954; "Junior Misses' and Misses' Two-Piece Pajama with Short and Long Pants and Sleep Coat: Mandarin style pajamas and sleep coat feature short kimono sleeves with slits at lower edge of shoulder seams. Pants have elastic casing at waist. V. 1 and 2 coats fasten with frog closings and have small stand up collars. V. 3 coat has button closing and tie belt."
Pattern fits ~~ Size 15; Bust 33, Waist 27; Hip 36. It has been cut for the short length pajama bottoms. Extensions are present. All pieces & directions included. The envelope is in terrible shape - torn, brittle, crumbling. Directions are age-browned. The first scan is from Wiki it shows the pajamas and sleep coat better than the envelope in this listing.