You will get 2 of those stickers (randomly chosen) with every order you place via this site free of charge (starting March 23rd 2023).
If you want more, you can buy a complete set of 4 (different ones) right here for only 1€.

Stickers are 9,8cm x 9,8cm, black printed on neon paper (mat).

PAYMENT via PayPal or Überweisung/standard bank transfer