Oioiooi team spent a long time to develop this adorable and brilliant magnetic alphabet play set. It is functional, durable, safe, made in the most environmentally friendly option for the material and production, and needless to say, very beautifully designed. The magnet piece is 5 mm thick and the accompanying cards are 2 mm thick. They are chunky - nothing like the usual flimsy magnetic pieces in similar products. They're easy to grab for little hands and made to last. Play with the matching card or display beautiful letters on your fridge or any metallic board.