Red wine is a delicacy made from dark-colored grapes, consumed all around the world. Many drink popular red wines like Pinot Noir, Cabernet Sauvignon, and Merlot for health reasons, food pairings, and special occasions. Many drinkers don't think of the glasses served with the fruity beverage, but the shape of the glass helps greatly when it comes to aroma and flavor. Red wine glasses can range from a minimum of eight ounces to well over 22 ounces. However, the standard red wine pour is five ounces, no matter what the size of the glass is. The rest of the head space in the glass is there to maximize the air contact with the wine.