One size includes 1 cutter.
If you want to make a design on the picture, buy 2 cutters with the sizes next to each other, for example:
15 mm / 0.6 inch and 20 mm / 0.8 inch
20 mm / 0.8 inch and 25 mm / 1 inch
If you want to make a design on the picture, buy 2 cutters with the sizes next to each other, for example:
15 mm / 0.6 inch and 20 mm / 0.8 inch
20 mm / 0.8 inch and 25 mm / 1 inch