We have an  Embroidered folded case Vintage item.  It measures about 4 1/2" in w x about 2 3/4" in l (it is folded in 1/2).  The inside has a stitched pocket .  It is very stiff more than likely with a heavy starch?  There are a series of small pin holes on it as shown in my photo - otherwise it is in nice condition.

Case Embroidered Vintage