but u gotta to allow to dealer discrepencies and the fact they are going to make money off it. so depending on the dealer the smaller the amount you buy the less likely it will be spot on to the correct fraction in grams. like a 10 bag in the uk should by devisions me 1/16 og an ounce which is about 1.6 gs but dealers are unscroupios so it maybe as low as 1.1 1.2 gs but then you dont have to buy of them.

hope that helps

peace