The building block of mosaics since the beginning of the art was the square and next came the rectangle. Edging, outlining and detail was formed by painstaking cutting of squares into rectangles. Now we have done the hard work for you with our molded, formed and glazed rectangle mix in low fired ceramic. The longest is 20mm the shortest 10 so that you will always find one that works in your project. The mix is made up of *4mm x 10mm *6mm x 15mm *10mm x 20mm *all 4mm thick NB Not suitable for outdoors unless they are sealed on the back first.