The National Institute on Alcohol Use and Alcoholism lists that a serving of alcohol in any beverage is .6 fluid ounces (14 grams of pure alcohol). That's just the ethanol without any dilution. With wine's large variation in ABV for different types, there's also a range of alcohol servings in a standard 750 mL bottle.

ABV for Different Types of Wine

ABV

Example

Servings of Alcohol in 7 mL

Wine per Serving

5.5% to 7.5%

Moscato d'Asti
Brachetto d'Aqui

2.3 to 3.2

8 to 11 ounces

8% to 9.5%

Riesling
Alsace blanc
Muscadet

3.4 to 4

6.3 to 7.5 ounces

10% to 11.5%

Lambrusco
Soave
Pinot grigio

4.2 to 4.8

2.6 to 3.1 ounces

12% to 13.5%

Bordeaux
Burgundy
Champagne
Rhône blends
Nebbiolo
Sangiovese
Rosé

5.1 to 5.7

2.2 to 2.5 ounces

14% to 15%

Cabernet sauvignon
Merlot
Pinot noir
Chardonnay
Zinfandel
Grenache

5.9 to 6.3

2 to 2.1 ounces

Source - National Institute on Alcohol Use

There are other, less common bottle sizes. However, in general, these are just multiples of the 750 mL bottle. For example, a magnum holds 1.5L, double a regular bottle, and a double magnum holds 3L, doubling the number of servings found in a magnum. A split holds 375 mL, so it cuts the number of alcohol servings in half. 

Types of Vintage Marbles

Approximate Values

Solid Core Swirl

$15 - $200

Divided Ribbon Core Swirl

$10 - $75