Carlo Riva is an Italian brand, which specialises in high quality shirtings. Besides, it makes pocket squares. Carlo Riva pocket squares have handrolled edges. The size of these pocket squares is large: about 42*42 cm. (learn more about pocket square sizes here). The brand uses its own fabrics, which are considered one of the best in the world. Composition: 60% linen 40% cotton.

Carlo Riva offers white pocket squares with coloured edges (navy, grey, sky blue, denim, burgundy, pink, gold). White pocket squares with white edges and denim blue pocket squares are available too. You can buy Carlo Riva pocket squares at MesChaussettesRouges.com. They cost 50 EUR (incl. VAT). As far as I know, they are never put on sales.