Three black vintage slips. 

Two with a slits:

One measures 13 inches across and stretches to 21 inches & 19 in in length.

The other is 14 inches across and stretches to 22 inches and 20 in in length.

The third is longer without a slit and features lace at the top. 

It measures 12 inches across and stretches to 19 in across & 24 in in length.