Yes, most wine servings are smaller, however, I have some red wine glasses here that hold 400+ml, so that is more than the average can of beer at 355ml. The wine glasses can be deceiving, making you think " I only had 2 glasses" in actual fact you had 2 glasses the size of Texas, therefore you really had 4 or 5 servings.

Add that to the double or triple the alcohol and you are in for a surprise when you stand up LOL.
* One 12 fl oz (355 mL) bottle of beer or wine cooler
* One 5 fl oz (148 mL) glass of wine
* One mixed drink containing 1.5 fl oz (44 mL) of 80-proof hard liquor, such as gin, whiskey, or rum
Its kinda like the meat serving size (a deck of cards is an average portion), yet most steaks you can buy in the store (or in a restaurant) are wayyyyyyy bigger.