50's modern tile set = 4 with satiny/matte mottled blue/gray glazing.  Attractive design and in great condition; never set.   Each tile measures 4 1/4" x 4 1/4" x 1/4" thick.     Made by Redondo Trusize.   Can be laid out in a few different ways.     We have lots of these!

If more than 4 tiles are needed, let us know.    We listed them as sets of 4, but any quantity can be purchased.