A dime bag of weed weighs about two grams. The cost of a dime bag is about $10. As of December 2012, marijuana is decriminalized in only a couple of states.
1 Additional Answer
A dime of weed can weigh around 3.5 grams if it is commercial quality weed. If it is medium quality weed a dime of weed will weigh around 1.75 grams. If it is hydro quality weed a dime of weed will weigh .5 of a gram.