These are very unusual napkins - they measure 13" x 27"  - truly a lapkin.  There are 11 in total.  The color is grey and best represented in the second photo.

I would date these to the late 1950's / 1960's.  I believe the origin is French.  The quality is fine and the design sophisticated.  The hems are machine stitched but they are tiny - almost rolled.  These have been used very carefully.