Sample of The Classic Pebble Mosaic Tile 11-1/2 in. x 11-1/2 in. in a Grey Blend. The pebbles in this mosaic are carefully cut on the back for even thickness while maintaining the natural curve outline of each individual pebble. The pebbles are then carefully laid on a mesh backing in an interlocking pattern for an easy installation and a stunning seamless finish. Color: Grey Blend / Natural.