These mats are 17 inches by 11 inches.
The embroidery is white-on-white linen.
I was told they are probably from the 1920’s, but I cant’s say that with any certainty.
There are no stains or holes that I can spot.
The only problem I see are that the set is two different shades of white. I think some may have been washed while others were never used. Examine the second photo and you will see slightly differing shades.