Original 1970s nightdress and gown from Canadian designer Claire Haddad. The nightdress is slip on, the overgown buttons down the front. 
In red brushed nylon it is labelled as a size medium.
Approx bust measurement of the night dress laid flat is 24"
Approx back length from base of neckline 50"
It is in very good condition, looking like it has rarely, if ever been worn.