Here are the ingredients roughly converted to US measures:
1 2/3 cups all purpose flour
1 tablespoon + 1/2 tsp cornstarch
2 sticks unsalted butter
3/4 cup powdered sugar
I used a 2" biscuit cutter to cut out the circles and a #3 cake decorating tip for the button holes. I used a tea ball to stamp the smaller circles. You can get creative, pretty much anything round will do the trick. The dough was a bit difficult to roll out, but the cookies turned out delicious. I attribute this to the two sticks of butter holding them together.