Set of 10 stainless steel round coasters designed by Alessi from Italy ca. 2000. All signed on the underside with Alessi 1/18 Inox Italy. The are very stackable so they make a pile without shifting. Nice dotted anti slipping design on it as well. These have minimal signs of use and age. and measure 11,5 cm or 4 1/2 inches in diameter. See the attached video for a 1979 Alessi commercial on Youtube!