This vintage 5x8 Curtain stretcher is large adjustable wooden frames which hold a curtain tightly in position for it to dry without creases and to keep its shape.
Curtain stretcher were helpful when it came to caring for delicate fabrics (like lace). Once curtains had been washed and starched, they would be stretched over the stretcher and held in place by the tiny pins that surrounded the frame. They would dry quickly on a sunny day.