What is Quarter bottle of champagne?

A "quarter bottle of champagne" is a bit of a tricky term. It's not a standard size, but rather a way of referring to a bottle that's smaller than a regular bottle of champagne.

Here's what it likely means:

* A 375ml bottle: This is the most common size referred to as a "quarter bottle." It's also known as a half bottle, as it's half the size of a standard 750ml bottle.

* A smaller bottle: It's possible, although less likely, that someone is using "quarter bottle" to refer to a bottle even smaller than 375ml. For example, a "split" bottle holds 187ml.

Important Note: It's always best to clarify with the seller or host what they mean by "quarter bottle" to avoid confusion. If possible, ask for the exact bottle size in milliliters.