The European Article Number (EAN) is a barcode standard, a 12- or 13-digit product identification code. Each EAN uniquely identifies the product, manufacturer, and its attributes; typically, the EAN is printed on a product label or packaging as a bar code
To work with retailers in Europe you will need to have EAN codes.
There are many options to buy EAN codes, here is a few options for you to buy them from:
https://instant-upc.com/?gclid=EAIaIQobChMIuqLcnMSC3AIVg_dRCh1fTAXsEAAYAiAAEgJ0E_D_BwE