Edit: Just found out they ship worldwide for €3.

https://www.glasses24.com/customer-support/shipping-and-deli...

I was amazed because until a friend told me about this site, I've been paying hundreds of euros just for the frames! At such a low cost, I could even order slight variations on the strength.

They have a lot of options for better lens material, have it darken in sunlight, anti glare coating etc, but I just got the cheapest one and it was fine.