The first number (e.g., 8 or 9) relates to the cork’s diameter, though the exact measurement system can vary slightly. A larger number indicates a wider cork.
The second number (e.g., 1 3/4 or 1 1/2) represents the cork’s length in inches.
Practical Differences
7×1 3/4 Straight Wine Corks:Â These corks are typically used for smaller bottles, such as 375ml (half bottles) or bottles with very narrow necks. They are not commonly used for standard 750ml wine bottles.
8×1 3/4 Straight Wine Corks:Â These are the standard size corks, most commonly used for 750ml wine bottles. They are a versatile choice suitable for everyday wines and wines intended for shorter-term aging.
9×1 1/2 Straight Wine Corks:Â These corks are slightly shorter than the standard length. They are often used for larger format bottles like 1.5L Magnums or some specialty bottles where a shorter cork is preferred, perhaps due to less headspace in the bottle.
9×1 3/4 Straight Wine Corks:Â These are the longest of the three sizes. They are typically used for premium wines that are intended for longer aging and are also often found in larger format bottles (1.5L Magnums and up). The extra length provides a more secure seal and greater protection against oxygen exchange, which is important for wines that will be cellared for extended periods.