Look carefully at the wording at the top of the can. 7 and 8 oz cans came into use about the same time with one exception, there is an 8 oz Fox Delux beer from the late 1930s.

For 32 oz cans see Quarts and for gallon cans see Gallons.

Cone tops came into use in 1935 and the last one was used by Rice Lake Brewing in 1960.

There are four types of cone tops: Low Profile, J-Spouts, Crowntainers, and High Profile cans. Check the wonderful Crowntainer Central page for detailed info on dating crowntainers by such details as paint types. One company, American Can, made high profile cones with flat bottoms in the 1940s.

Low Profile cones were generally used before World War II, high profiles were used after. High Profile conetops came into common use right before World War II and were used until 1960. There were used by only a handful of breweries, Esslinger, Schmidt's, Gunther, and American in Rochester, NY.

Other odd sizes started to meet local tax laws on alcohol.

10 and 11 oz cans were produced starting in the 1950s and 14 oz cans began to be produced in the early 1960s.

There are often exceptions to these rules so I'll try to include them when I can.

I'll start off with some general hints and rules and then we'll get to specifics.

For example, Olympia cans show a copyright date from well before Prohibition.

This does not mean that the can is from that year (a mistake I've seen on e Bay) but only that the label design was copyrighted then. If you see a can with "Copyright 1946" on it, then you know it does not date earlier than that.

There are exceptions for some West Coast cans where low profile tops were used in the late 1940s. Crowntainers were used between 1940 and about 1953-54. There should be a small box with patent information. WARNING: A lot of fake conetops have flat bottoms and high profile spouts. Flat top 15 and 16 oz cans came into use starting in 1953 so a flat top 16 oz can would date between 1953-1964.