I'm like 6'2" and weigh about 210 and it only takes a small bowl to get me stoned. I consider myself pretty lucky since it doesn't take much to get me high. However a lot of people call people with low tolerance "lightweight" like it's a bad thing or something. Shit I rather smoke a bowl and be fucked up rather than smoking 20 dollars worth the weed just to get a buzz. I say rock on lightweight and fuck the "heavyweights" :P