Red 1940s WW2 Propeller Shaped Buttons 1.5cm, 1.7cm or 2.8cm

Very red 1940s vintage casein buttons, made in French Canada during WW2 in the shape of propellers  -so the population could show their support for the war effort by sewing them onto the clothes they made.
I have 3 sizes and different quantities :

1.5cm - 24 or 6 on a card
2.2cm - 12 or 6 on a card
2.8cm - 12 or 4 on card