Topic about heights: http://www.gamesas.com/bgsforums/index.php?showtopic=872601&hl=height
As far as we know bosmer, dunmer and altmer can become somewhere between 500 and 1000 years old.
It all depends on the type of person however. A wealthy person would be able to afford better health care and thus would live longer.
The average age for Dunmer are thought to be:
Commoner: 100-140
Nobility: 500-1000
Other (Telvanni): 2000-4000 (they do use magic to lengtten their lifespan however.)
The best known qoutes about Elven age are:
It was a strange practice for him to lead a night operation, but scarcely more bizarre than anything else he was facing. He was only seventy years of age, far from old for a Bosmer, and yet he felt like he belonged to another era.
Katisha's face briefly wore the envious, wistful look humans got when contemplating the thousand-year lifespan Elves had been granted by the gods. True, few ever actually lived that long as disease and violence took their respective tolls. But they could. And one or two of them actually did.
Well, I'm fifty, done my twenty years in the Service, and I'm in the prime of life. I expect another fifty good years, and then I'll be old, and slow, chatting with gaffers around the hearth for another twenty, thirty years. I've known mer still mind-sharp in their late hundreds, and heard of folk 200 and older. My family usually makes it to 120-130, providing we don't get sick or poked in the eye.