I found this toni kroos authentic jersey on ebay, can you confirm if it is a real one?

Its fake. This is how a real tag looks like, straight from the Real Madrid store.

You’ll also notice Adidas uses woven fiber to attach the tags now (at least on all their jerseys) not plastic

https://preview.redd.it/3p3mplpetaod1.jpeg?width=3000&format=pjpg&auto=webp&s=de782eea630e66944e2df38735201d3eb492f8c7