I marched into my favorite yarn shop to get some help. I bought KnitPro Symfonie double pointed wooden knitting needles; size 3. They are made of birch.
They are so pretty and feel so good. They costed pretty much: 12,30€. But I am really satisfied to them. They are most expensive knitting needles I have ever bought but really are worth of each cent. If you consider to but them; go for it. You won't regret despite they cost much more than bamboo knitting needles.