There are only three types of glasses that you absolutely need in your bar at home:
The old-fashioned short, squatty, wide base glass, that typically holds about 6-10 ounce drinks.
Then there’s the highball glass (often referred to as a tumbler) that will serve a an 8-12oz drink. These are taller than the old fashioned glass squat ones.
And the Martini glass – think James Bond here). An inverted cone bowl with a slender stem and wide flat base. This one can be anywhere from 6oz to the HUGE Margherita glasses you find at your neighborhood Mexican restaurant with a busy Happy Hour.