an1/8 of an oz is 3.5 grams ..if your bag ways less then that you got beat.if it ways more then that you did good .but math is math an 1/8 ways 3.5 grams end of story (guru every buy a four finger bag ) back in the day not every one had a scale nor needed one you would pay 10$ of a baggie that had about four fingers deep ,ah the good old days .peace,love,rastafari