Red wine glasses are slightly larger because red wines are used to accompany a meal, and using a large glass allows the wine to come into full contact with the air and oxidize, making the wine richer and more full-bodied.
The tulip glass is used solely for the purpose of observing the bubbles and assessing the quality of the wine.
Two wines from Germany are served in green glasses. This is because the wine itself is bottled in green. And of course it is a reflection of tradition. These are called the Rhine Glass, which is large and has a short, thick foot for semi-sweet white wines, and the Moselle Glass, which is small and has a long, thin foot for less sweet wines.
Bottles are also distinctive
Boredeau has parallel shoulders, Burgundy has low shoulders, and Alsace has a long neck. The Italian straw is more primitive. Of course, France used to be the same, and it was only later that legal regulations differentiated between Alsace, Bordeaux and Burgundy bottles, but a few chateaux owners still keep straw shaped bottles of brandy in their cellars. The most famous is Hennessy.
The gesture of holding the glass is also extremely important, usually the index, middle and thumb fingers pinching the base or foot of the glass, so that it is easier to see the color of the wine in the glass, easier to shake the wine in the glass to smell more fruit, and lastly, so that the temperature of the hand does not affect the quality of the wine. (Only a brandy glass requires the temperature of the palm of the hand, so a brandy glass is not high but is large and requires the embrace of two palms.)