For example, who knew that there were different types of glassware for different types of beers? Definitely, one could pour anything into near any reasonably-sized container and manage make it to one's mouth. And if that something is beer, it'd probably make for an enjoyable experience! Yet, there are dozens of geographical, historical, and sensory reasons to match specifically shaped glassware with certain brews.
Even the size alone ends up saying volumes, pardon the pun. I found I needed a better grounding in converting US fluid ounces, metric, and imperial measurements.
For both reasons, I'm going to pick up some traditional English pint glasses as in the photo above. These are most often used with stouts and ales. You will note each has a bulge which sort of reminds me of an elementary-school, lunch room. This characteristic provides the glasses with the name nonic, or 'no nick' as they stand up better to constant use. Also, the feature makes them inherently more stack-able. In order to meet my needs I will purchase ones which hold 20 ounces as that's a 'real' English pint (as opposed to the US-standard 16 ounces) and thusly, I will be able to get an easy three glasses from a 2-quart growler. My other glass sizes are determined more by practicality than correctness to the beverage choice.
I already have a set of pilsner glasses, not so much because I primarily serve lagers, but because they are exactly 12 ounces. This is size of normal, North American single-serve bottle or can. This also means I can get a very comfortable five glasses from the same growler.
Finally, I will keep a few of my big ole' glass beer mugs. They measure 750 ml each so as to hold the contents of a 22-ounce bomber bottle with room for the head. I can use them when there are just two people who want to share the same half-gallon growler.