This lovely set of four coasters features a combination of solid white and whispy Tifanny style blue glass in the classic pinwheel design. As extra fun, the white has been adorned with sparkling irridescent dichroic glass dusted on the white before firing. The sparkle fom the Nasa created dichroic glass and the sublte bubbles it created while firing in the kiln gives these coasters that extra special touch. Each coaster measures aprox 4x4"