Numo is sold in sets because a table is a composition, not a collection of single pieces.
Set of 2 is for the everyday — a place for two, or a considered corner of a larger surface. Set of 4 is the family table, the standard dinner. Set of 6 is for the table that hosts: enough to lay a full setting without breaking the line.
Our advice is simple. Buy for the table you actually use, then add a matching Coaster set in the same tone. The Numo Kit pairs both at a saving — for the surface you'd rather not think about twice.