Huge Spool of White Nylon Yarn and 3 Square Cloth Designs

My grandma used the large spoon of white yarn to crochet the 3 square intricate cloths, with triangle designs. The 3 clothes each slightly decrease in size, with the measuring tape showing: 20, 19 and 18 inches. I didn't measure the other side. There are some loose strings in the deisgn.