How full should a glass of white wine be?

Port

There really isn't a specific port glass. Port would be served in a dessert wine glass and those are smaller than both red and white wine glasses.

And, no, you shouldn't serve white wine in a dessert wine glass. Serve white wine in an average sized glass that is clear. For more detail, to see a picture, and learn about all types of wine glasses, go to my website page on types of wine glasses.