Burgundy or Bordeaux, and how many cl
The two classic shapes do exactly opposite things. The Burgundy bowl is round and wide, with a rim that curves slightly inward so volatile aromas linger. That model is meant for pinot noir, nebbiolo and other grapes where fragrance matters more than structure, and runs from 75 to 96 cl. The Bordeaux bowl is taller and straighter, guiding the wine deeper into the mouth and thereby softening the tannins of cabernet sauvignon, syrah or tempranillo. There you are looking at around 55 to 75 cl. Both shapes come in toughened hospitality glass and in thin-blown lead-free crystal, and you notice that difference mostly at the rim.
If you want one glass for all red wine, choose a universal bowl between 43 and 55 cl: roomy enough to swirl, small enough not to look empty. If you are after the very largest models, they are with the large wine glasses. White wine calls for different sizes and a different shape, which you will find with the white wine glasses.