This is a vintage nightie set for women from the 1940s. The set includes two pieces in peach color, size 4 and 6, both in regular size type. The style is babydoll and the brand is Best and Comp.  Please note that these are vintage sets likely from the 1940's sizes were much smaller in previous years.  These would not equate to the size 4 and 6 we are familiar with today.