A simple guide to glassware can be found here if you want to get in the ballpark of what beer goes with what glass. Take it with a grain of salt because personal preference, occasion, and availability of glassware always change. Not every glass looks or are constructed the same either, which means that some are better suited for a style than others. For example, they don't have Imperial Stout listed under the mug section. I happen to have a mug that is perfect for Imperial Stouts because the sides are not dimpled like the one in the picture and are not curved like a snifter. It gets much better head formation and lacing despite the lower carbonation and higher alcohol content. I get a better drinking experience with it despite that website saying it's not the ideal glass. I also have a DFH pint glass that is not shaped like pint glass they have listed. It has a top that is curved a bit inward like a snifter. There are many beers that I like drinking out of this glass, but there are others where I prefer the "standard" pint glass that opens at the top normally. According to that list I could drink an English Mild out of it, but I would prefer a different pint glass because of the shape. In the end you are paying for the beer so you might as well make enjoy it in the glass you like.