nickel bags cost 5 bux and are just 1 blunt. i've only seen them sold by street dealers in the ghetto.
and the size doesn't matter, it's what's inside.
for example, i've seen nickel bags that won't roll a single decent joint, because it was pure shake...
i've seen nickel bags roll 2 nice joints b/c the dealer stuffed a single large bud thing in the bag.... so it depends on what you get, if you get to pick it out, pick out the more buddish looking bags, the shake bags can be left behind....
dime bags cost 10 bucks and depending on strength, can be as small as a nickel bag if stuffed with grade A bud, or can be surprisingly large if it's crappity crap...