Part of the Opus Romano range, circles are 3mm thick and available in 18mm and 23mm diameters. Whole sheets are supplied paper faced and mixed sheets are supplied loose. Top surface is also pictured for all colours. 18mm diameter sheets are 290mm x 290mm and contain 240 pieces, while 23mm sheets measure 300mm x 300mm and contain 168 pieces. Mixed sheets comprise an assortment of sizes and have a coverage of 300mm x 300mm.