a gram is generally how much it would take to make a pencil-thick blunt. or two pencil-thick joints.

that's the way i've always learned.

and if you still wanna know about how much an ounce is, it's pretty much a ziploc sandwich bag full, with some nice bulge.

and alot of times, a small nug or two will make a gram.

if you're gonna start dealing you NEED a digital scale. make a run to wal-mart and shell out about 30 bucks. you'll be glad you did.