What is the diameter of a 6 liter wine bottle?

There's no standard size for wine bottles, and "6 liters" isn't a common size. Here's why it's hard to give you a precise diameter:

* Volume isn't the only factor: The shape of the bottle (tall and slender vs. short and wide) greatly affects the diameter.

* Wine bottles aren't perfectly cylindrical: They have a tapered neck and base.

* "6 liters" could be a custom bottle: It's not a standard wine bottle size.

To get an idea:

* Standard 750ml wine bottles: These are typically about 3 inches in diameter at their widest point.

* Magnum (1.5 liters): These are roughly 4-5 inches in diameter.

* Jeroboam (3 liters): These are larger, potentially 6-8 inches in diameter.

Without knowing the exact bottle shape, it's impossible to determine the diameter with precision. You'd need to find a 6-liter wine bottle or a similar bottle with known dimensions and measure it directly.