The big 6 in wine refers to 3 globally recognized white grape varieties and 3 red variants. For whites, the big players are Chardonnay, Sauvignon Blanc, and Riesling. As for reds, Pinot Noir and Syrah (Shiraz) hold the spotlight. Chief competitors for the third place are Merlot and Cabernet, which are alike and often blended together. Naked Wines is a great source of all these varietals.