Generally taller than humans but also usually slimmer so... It equates about the same as humans can handle, with alcohol
When it comes to brewing their own drinks, it's usually root beers, and wines made from fermented forest fruit, as well as some killer spirits (very very strong).
Attitudes to drink vary a lot, the only really universal one is Don't Drink and Hunt. You can get alcoholic Elves, and you can get Elves that'll never touch a drop, out of principle, or just because they dislike the taste