A schooner typically holds different amounts depending on the country and region:
- In Australia, a schooner is generally 425 milliliters (ml), except in South Australia where it is 285 ml. This is the most common size in states like New South Wales, Victoria, Queensland, Tasmania, and others.
- In Canada, a schooner refers to a larger beer glass usually about 946 ml (32 US fluid ounces).
- In the United States, schooners vary in shape and size, usually ranging from about 532 to 946 ml (18 to 32 US fluid ounces).
So, the most common standard size for a schooner is 425 ml in Australia and about 946 ml in Canada, with some variation in the US. If referring to Australia, 425 ml is the typical volume for a schooner.