Oooh...this is sooo cool!    Made by William Heller, Inc, this is a kit to make a fab dress from the 50's.   Includes the instructions, a belt and pre-marked orlon / wool "Heller" jersey knit fabric, complete with embellished neckline.   Evidently you stitch on the dotted lines and voila...you have a dress.   It appears that you can make either the chemise or the sheath...or they even give you ideas to customize it.    I'm a bit afraid to unfold it any more, or I'll NEVER get it folded back up correctly.   All appears to be in really good condition!  The fabric is a light to midweight jersey knit that fells like it will drape nicely. The fabric content is 80% orlon and 20% wool.    There is no size on the packaging, but I did measure the included belt and it appears to be around a 34" waist.   The belt can be trimmed for a smaller waist.