What size socks for baby?

Ella

Cant make it to Wal-Mart to look at how big the socks are for babies but my daughter is 7 weeks old and her feet are too big for 0-3 month socks. In clothes she already fits into 6 and 6-9 month clothes since shes 12 lbs. But what size socks would she most likely fit into? 0-6? Are these bigger? Or would 6-12 be better or wayyyy too big?