The set includes 2 mirrored cutters.
The best result is achieved when the clay is 3 mm thick.
The size refers to the width of the shape.
The dimensions are:
Size 1 - W: 25 mm / 1 in - H: 20 mm / 0.8 in
Size 2 - W: 32 mm / 1.25 in - H: 25 mm / 1 in
All sizes are for the final product (clay piece after the cut), and not the size of the tool.