The set includes 2 mirrored top and bottom cutters.
The size refers to the height of the main shape.
The topper is adjusted proportionately for each size.
Below are the dimensions of the bottom shapes:
Size 1 - H & W: 25 mm / 1 inches
Size 2 - H & W: 30 mm / 1.2 inches
Size 3 - H & W: 38 mm / 1.5 inches