Not of beer, but that's a different topic.
If you weren't jabbin' at me Adam I would be disappointed. If I don't mess with you I don't like you.
Walk into any brewery here and pours are almost always in oz. But the amount is not standard. 1oz sample, 4oz sample, 8oz half pour, 10, 12, 16(normally a pint but a lot of times the barista is too young and I have to clarify), 20 is about the max on draft to consume in house. You can get 32oz "howlers" and 64oz "growlers" poured from draft to go. 12oz is still the most common packaged volume, can or bottle. Most places recognize the damage UV does to hops so bottles are almost always brown. Packaging outside of 12, 16, or 19.2oz is usually a small brewery with a special offering and more often than not in a metric vessel. 375ml and 750ml is fairly common.