Linen cocktail or tea napkins Hardanger style threadwork embroidery vintage hc2279

This is a set of 5 handmade cocktail or tea sized napkins (7.5 x 8 inches). They are made of linen with extensive threadwork and embroidery in dark blue. I referred to this as Hardanger but I'm not sure that is what it is. If you can enlighten me I will be glad to hear from you. Condition is excellent. No damage or stains of any kind.